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United States Government Accountability Office: 

GAO: 

Testimony: 

Before the Subcommittee on Aviation,Committee on Transportation and 
Infrastructure, House of Representatives: 

For Release on Delivery: 

Expected at 2:00 p.m. EST Wednesday, February 14, 2007: 

Federal Aviation Administration: 

Challenges Facing the Agency in Fiscal Year 2008 and Beyond: 

Statement of Gerald L. Dillingham, Ph.D.
Director, Physical Infrastructure Issues: 

GAO-07-490T: 

GAO Highlights: 

Highlights of GAO-07-490T, a testimony to Subcommittee on Aviation, 
Committee on Transportation and Infrastructure, House of 
Representatives 

Why GAO Did This Study: 

FAA operates one of the safest air transportation systems in the world. 
It is, however, a system under strain. The skies over America are 
becoming more crowded every day. FAA faces the daunting task of safely 
integrating a growing influx of passengers and aircraft into the system 
and simultaneously leading the transition to the Next Generation Air 
Transportation System (NextGen)—a complicated effort to modernize the 
system. FAA’s broad responsibilities to maintain and modernize the 
nation’s air transportation system must be met in an uncertain 
budgetary and long-term fiscal environment. GAO’s concerns about 
financing the nation’s transportation system, including aviation, led 
GAO to designate this issue as high-risk. 

This statement is based on recent reports and interviews with FAA 
officials. It focuses on FAA’s challenges relating to (1) ensuring the 
continued safe operation of the nation’s airspace system, (2) 
continuing to improve FAA’s management while leading the transition to 
NextGen, and (3) funding issues concerning capital improvements for 
airports and FAA’s reauthorization. 

What GAO Found: 

To ensure continued safety within the national airspace system, FAA is 
using risk-based, data-driven safety programs to oversee the industry; 
however, the agency faces data and human resource challenges that 
affect its ability to fully implement these programs. GAO has 
previously recommended that FAA improve the accuracy and completeness 
of the safety data and analysis of that data needed to monitor safety 
trends, fully implement its safety programs, and assess their 
effectiveness to determine if they are focused on the greatest safety 
risk. FAA has made progress in this area but more remains to be done. 
FAA’s ability to oversee the aviation industry will be further affected 
by its ability to hire, train, and deploy its primary workforce of 
safety inspectors, engineers, and air traffic controllers. The 
expansion of FAA’s oversight program for air carriers will result in 
workload shifts for its inspectors that will make it important for FAA 
to improve its staffing process. In addition, the agency estimates that 
it will lose about 70 percent of the air traffic controller workforce 
over the next 10 years, primarily due to retirements. 

FAA has made significant progress in implementing management processes 
and systems that use leading practices of private sector businesses; 
however, further work remains to institutionalize these efforts. For 
example, new and improved acquisition processes and oversight have 
contributed to FAA meeting its acquisition cost and schedule goals for 
the last three years. Additional work remains, though—FAA received a 
qualified opinion on its most recent financial audit as a result of 
lack of support for the accuracy of about $4.7 billion for equipment. 
Moreover, GAO has previously recommended that FAA should undertake 
additional efforts to consolidate its facilities and outsource some of 
its services to further cut costs. Some key challenges for the 
transition to NextGen include completing the design and cost estimates 
for NextGen and proposing how that cost will be funded. FAA will also 
need to assess its capacity to handle the technical and contract 
management expertise that will be required to oversee the 
implementation of NextGen. 

FAA estimates that the total cost for planned airport development that 
is eligible for funding from the Airport Improvement Program (AIP) will 
be about $42 billion for 2007 through 2011. FAA’s budget request for 
fiscal year 2008 proposes significant cuts in AIP. These cuts, along 
with changes to the way AIP is allocated among airports and possible 
increases in the cap on passenger ticket charges for airport projects, 
could have implications for the amount of funding available for planned 
airport development, especially at small airports. Additionally, the 
taxes that fund the Airport and Airway Trust Fund are scheduled to 
expire at the end of fiscal year 2007. Until Congress reauthorizes 
those taxes, FAA’s ability to carry out programs related to airport 
development as well as some other programs throughout the agency may be 
in jeopardy, compounding the safety and management challenges facing 
FAA. 

What GAO Recommends: 

In prior reports, GAO has made recommendations to address data and 
management problems. Although FAA has begun to address them, many have 
not been fully implemented. 

[Hyperlink, http://www.gao.gov/cgi-bin/getrpt?GAO-07-490T]. 

To view the full product, including the scope and methodology, click on 
the link above. For more information, contact Gerald Dillingham, Ph.D., 
202-512-2834, dillinghamg@gao.gov. 

[End of section] 

Mr. Chairman and Members of the Subcommittee: 

I appreciate the opportunity to testify before you today as you 
consider the Administration's budget proposal for the Federal Aviation 
Administration (FAA) for fiscal year 2008. FAA operates one of the 
safest air transportation systems in the world. It is, however, a 
system under strain. The skies over America are becoming more crowded 
every day. Demand for air travel has increased in recent years, with 
over 740 million passengers flying in fiscal year 2006, climbing toward 
an estimated 1 billion passengers per year in 2015, according to FAA 
estimates. These passengers are expected to find more choices of 
aircraft in the years ahead, ranging from the jumbo Airbus A380 that 
can hold more than 500 passengers, to very light jets that might 
transport 6 or fewer passengers on any given flight. Already with 
increasing demand has come an increase in flight arrival delays; such 
delays are nearing the levels of 2000, a year in which 1 in 4 flights 
reached its destination behind schedule. And although the system 
remains extraordinarily safe, if the current accident rate continues 
while air traffic potentially triples in the next 20 years, this 
country would see nine fatal commercial accidents each year, on 
average. FAA thus faces the daunting task of safely integrating this 
expected influx of passengers and aircraft into the system and 
simultaneously leading the transition to the Next Generation Air 
Transportation System (NextGen)--an enormously complicated endeavor to 
transform the air traffic control system. 

FAA's broad responsibilities to maintain and modernize the nation's air 
transportation system must be met in an uncertain budgetary and long- 
term fiscal environment. We recently reported that the federal 
government's financial condition and fiscal outlook are worse than many 
may understand.[Footnote 1] Additionally, our concerns about financing 
the nation's transportation system, including the aviation system, led 
us to designate this issue as high-risk.[Footnote 2] These 
circumstances provide the context for my testimony today. In 
particular, I will focus on some of the key challenges and issues 
facing FAA and the Congress as the fiscal year 2008 budget for FAA is 
considered. These challenges and issues are related to (1) ensuring the 
continued safe operation of the nation's airspace system, (2) 
continuing to improve FAA's internal management while leading the 
transition to NextGen, and (3) funding issues concerning capital 
improvements for airports and FAA's reauthorization. My statement is 
based on our recent reports and updates that we obtained through 
interviewing FAA officials and reviewing their documentation. We 
conducted this work in accordance with generally accepted government 
auditing standards. 

In summary: 

* To maintain and expand the margin of safety within the national 
airspace system, FAA is using risk-based, data-driven safety programs 
to oversee the industry; however, the agency faces data and human 
resource challenges that affect its ability to fully implement these 
programs. These challenges are especially important in light of the 
agency not meeting its performance target for commercial air carrier 
safety for fiscal year 2006 because of recent fatal accidents and 
predictions of greatly increased air travel. FAA's approaches to safety 
require that the agency obtain accurate and complete data to monitor 
safety trends, fully implement its safety programs, and assess their 
effectiveness to determine if they are focused on the greatest safety 
risk. We have previously recommended that FAA improve the accuracy and 
completeness of its safety data and its analysis of that data. FAA has 
made progress in this area but more work remains. FAA's ability to 
oversee the aviation industry and ensure a safe national air space 
system will be further affected by its ability to hire, train, and 
deploy its primary workforce of safety inspectors, engineers, and air 
traffic controllers. The expansion of its oversight program for air 
carriers will result in workload shifts for its inspector workforce 
that will make it important for FAA to improve its staffing process and 
address its lack of a staffing model. In addition, the agency estimates 
that it will lose more than 10,000, or about 70 percent, of the air 
traffic controller workforce over the next 10 years, primarily due to 
retirements. In recent years, air traffic controllers have been 
retiring at a faster rate than FAA anticipated, exacerbating this 
hiring challenge. 

* FAA has made significant progress in implementing management 
processes and systems that use leading practices of private sector 
businesses; however, further work remains to institutionalize these 
efforts. FAA's progress led us to remove its financial management from 
our high-risk list. Similarly, new and improved acquisition processes 
and oversight have contributed to FAA reporting that it has met its 
acquisition cost and schedule goals for the last three years. 
Nonetheless, making and institutionalizing further improvements in 
acquisition and investment management are still needed. For example, 
while FAA has established a cost estimating methodology for 
investments, it has not implemented it. In addition, during the last 
two fiscal years, FAA has reported cost savings and cost avoidance of 
$99.1 million and $81.9 million, respectively. Additional work remains, 
though--FAA received a qualified opinion on its most recent financial 
audit as a result of the agency's inability to support the accuracy and 
completeness of about $4.7 billion for equipment reported in the 
financial statements. Moreover, as we have previously recommended, FAA 
should undertake additional efforts to consolidate its facilities and 
outsource some of its services to further cut costs. FAA's focus on 
maintaining and improving its record of internal achievement will be 
further tested as it joins with its partners in the Joint Planning and 
Development Office in transitioning from planning to implementing 
NextGen. Some key challenges for the transition include completing the 
design and cost estimates for NextGen and proposing how that cost will 
be funded, especially in view of reduced funding for applied 
aeronautical research, which is necessary to achieve some critical 
NextGen capabilities. FAA will also need to assess if it has the 
necessary expertise to handle the technical and contract management 
that will be required to oversee the implementation of NextGen. 

* Related to the challenge of modernizing the air traffic control 
system, FAA faces the challenge of ensuring that the nation's 3,400 
airports develop the capacity to safely and efficiently handle the 
projected growth in the demand for air travel. FAA estimates that the 
total cost for planned airport development that is eligible for funding 
from the Airport Improvement Program (AIP) will be about $42 billion 
for 2007 through 2011. FAA administers the AIP, which provides federal 
funds for capital development projects at the entire range of the 
nation's airports. In its fiscal year 2008 budget proposal, the 
Administration has proposed reducing funding for AIP grants and 
changing the allocation formula. Other changes being considered by FAA 
could increase available funds for airport development. The net effect 
of all these changes on the amount of funding available for planned 
airport development is uncertain. Additionally, the excise taxes that 
fund the Airport and Airway Trust Fund, such as those on ticket 
purchases by airline passengers and aviation fuel, are scheduled to 
expire at the end of fiscal year 2007. Avoiding a lapse in revenue to 
the trust fund in fiscal year 2008 will require Congressional action. 
About 80 percent of the budget request for FAA would be funded by the 
trust fund and the remainder by the general fund. Without a continued 
flow of funds to the trust fund, FAA's ability to carry out AIP and 
other programs throughout the agency may be in jeopardy, compounding 
the safety and management challenges facing the agency. 

FAA Faces Challenges in Ensuring the Safe and Efficient Operation of 
the Nation's Airspace System: 

Aviation safety is a priority goal for FAA. That priority is reflected 
in the Administration's budget for fiscal year 2008, which requests 
$1.9 billion to promote aviation safety and efficiency. To the credit 
of FAA and the aviation industry, U.S. commercial aviation has had an 
extraordinary safety record in recent years. In 1997, FAA established a 
goal to reduce the commercial fatal accident rate by 80 percent in 10 
years and for many years the agency has made incremental progress 
toward that goal. However, increased air traffic, leading to congestion 
and delays, is straining the efficiency and potentially the safety of 
the nation's airspace system. Moreover, while commercial aviation 
safety trends have been positive over the last several years, FAA did 
not meet its performance target for commercial aviation accidents last 
year and does not expect to meet its target for 2007. If air traffic 
triples as expected over the next two decades and the accident rate of 
recent years is unchanged, there would be nine fatal commercial 
aviation accidents each year, on average. 

To maintain a safe and efficient airspace system, especially if 
substantial growth in the industry materializes, it will be important 
for FAA to have well-established, efficient, and effective processes in 
place to provide an early warning of hazards that can lead to 
accidents. It will also need a skilled workforce to implement these 
processes. FAA is moving to a system safety approach to oversight and 
has established risk-based, data-driven safety programs to oversee the 
industry and a workforce that includes approximately 4,500 safety 
inspectors and engineers to implement those programs, about 15,420 air 
traffic controllers, and nearly 7,200 technicians responsible for 
maintaining FAA's air traffic control equipment and facilities. In 
addition, FAA leverages its inspector and engineer workforce through 
its "designee" programs, in which about 13,400 private individuals and 
over 200 organizations have been delegated to act on the agency's 
behalf. Our recent work has identified data limitations and human 
resource challenges facing the agency that affect its ability to 
implement these programs and oversee aviation safety. 

Data Limitations Affect FAA's Ability to Manage Risk: 

FAA's ability to identify and respond to trends and early warnings of 
safety problems and to manage risk is limited by incomplete and 
inaccurate data. While FAA has developed risk-based processes for 
monitoring and inspecting the aviation industry, in some cases, the 
implementation of those processes is hampered by the lack of reliable 
and complete data, which are important for identifying and mitigating 
safety risks. In other cases, FAA does not fully utilize the data it 
collects by evaluating or analyzing it for nationwide safety trends. 

For example, FAA does not collect actual flight activity data for 
general aviation operators and air taxis. Instead, the agency uses an 
annual survey to query a sample of registered aircraft owners about the 
activity of their aircraft during the previous year. The National 
Transportation Safety Board[Footnote 3] (NTSB) noted a number of 
problems with these data, such as historically low response rates, and 
concluded that FAA's data do not accurately portray changes in general 
aviation activity.[Footnote 4] As a result, FAA lacks information to 
monitor the rate of general aviation accidents, which decreased from 
1,715 in 2002 to about 1,500 in 2006. (See fig. 1.) Therefore, the 
agency cannot meaningfully evaluate changes in the number of general 
aviation accidents or determine the effect of its general aviation 
safety initiatives. NTSB made a number of recommendations to FAA to 
improve the accuracy of the survey data, such as improving the currency 
of aircraft owner contact information. 

Figure 1: Number of General Aviation Accidents and Fatalities, 2000 
through 2006: 

[See PDF for Image] 

Source: NTSB. 

[End of figure] 

As another example, FAA does not collect basic data to measure changes 
in the air ambulance industry, such as flight hours or number of trips 
flown. From 1998 through 2005, the air ambulance industry averaged 11 
accidents per year, peaking at 18 accidents in 2003. (See fig. 2.) 
Without data about the number of flights or flight hours, FAA and the 
air ambulance industry are unable to identify whether the increased 
number of accidents has resulted in an increased accident rate, or 
whether it is a reflection of growth in the industry. Data describing 
the safety trends of the industry are essential to understanding the 
impact of FAA efforts to improve air ambulance safety. 

Figure 2: Total Air Ambulance Accidents, 1998 to 2005: 

[See PDF for Image] 

Source: GAO analysis of NTSB data. 

[End of Figure] 

In addition, while FAA receives important data, including self- 
reporting of safety violations, through its partnership programs with 
industry, the agency does not evaluate this information for nationwide 
trends. According to FAA officials, the Aviation Safety Action Program, 
Aviation Safety Reporting Program, and Voluntary Disclosure Reporting 
Program[Footnote 5] allow the agency to be aware of many more safety 
incidents than are discovered during inspections and surveillance. 
Although FAA tracks the actions taken to resolve the individual safety 
violations that it learns about through these programs, it does not 
evaluate such information in the aggregate to identify trends in 
violations and their potential cause in order to improve safety. We 
recommended that FAA develop a continuous evaluative process for its 
industry partnership programs, and use it to create measurable 
performance goals for the programs and track performance towards those 
goals.[Footnote 6] FAA has not taken these actions, but has begun to 
address other data issues. 

FAA recognizes the critical nature of the issues associated with its 
data. To address its data limitations, FAA is in the early stages of 
planning the Aviation Safety Information Analysis and Sharing system-- 
a comprehensive new data system that is expected to provide the agency 
with access to a vast amount of safety data that reside with entities 
such as NTSB and industry partners including airlines and repair 
stations. Working with the National Aeronautics and Space 
Administration (NASA), FAA began planning for the new system in 2006. 
Because this activity is in the early planning stages, our concerns 
about FAA's data remain relevant. The fiscal year 2008 budget for FAA 
proposes $32 million for safety databases and computer systems. As FAA 
prioritizes the activities that it undertakes with such funds, it will 
be important to continue addressing these critical data limitations. 

FAA Faces Workload Challenges for its Safety Inspectors: 

Changes to FAA's oversight programs, such as the planned rapid 
expansion of the Air Transportation Oversight System (ATOS), from 16 
air carriers in 2005 to approximately 115 air carriers by the end of 
2007, will pose workload challenges for FAA's safety inspector 
workforce of about 3,600. As FAA moves air carriers under the ATOS 
program, it will also move inspectors to the program. As of January 
2007, the 51 air carriers in ATOS were overseen by 829 safety 
inspectors. Unlike other FAA inspection programs, ATOS inspectors are 
dedicated to an air carrier and generally cannot be used to inspect 
other entities. Inspectors who are not part of ATOS, on the other hand, 
have duties in addition to inspecting air carriers--such as overseeing 
repair stations, designees, and aviation schools, and investigating 
accidents. In prior work, we found that about 75 percent of the non- 
ATOS inspectors had responsibility for more than 3 entities and about 
half had responsibility for more than 15. In addition, we found that 
ATOS requires more inspectors per airline than the traditional 
inspection approach.[Footnote 7] As inspectors are transitioned to 
ATOS, the remaining inspectors will have to add those other entities to 
their workload. With the expansion of ATOS that will continue into 
fiscal year 2008, it will be important to monitor the magnitude of the 
shift in resources and the effect it may have on FAA's overall 
capability to oversee the industry. 

Part of the challenge that FAA faces with regard to safety inspectors 
is improving its process for determining staffing needs. This is 
especially important as oversight activities and workload shifts with 
the expansion of ATOS and other program changes, yet FAA lacks staffing 
standards for safety inspectors. The National Academy of Sciences, 
under a congressional mandate, recently completed a study for FAA that 
analyzed FAA's staffing processes for safety inspectors.[Footnote 8] 
The study identified a number of issues that FAA must address when 
developing a staffing model for safety inspectors. For instance, the 
study included concerns that the current staffing process does not 
focus resources in the areas of greatest need and the match between 
individual inspectors' technical knowledge and the facilities and 
operations they oversee is not always optimal. The study recommended a 
process for FAA to follow to develop a staffing model and identified 
key factors--such as changes in aircraft and systems, changes in FAA 
oversight practices including a shift to a system safety approach 
through programs like ATOS and increasing the use of designees, and new 
knowledge and skill demands--that should be considered in developing 
the model. In response to the Academy's recommendations, FAA expects to 
develop a staffing model, but the agency does not have a specific 
timeframe for initiating this effort. With nearly $1 billion of the 
fiscal year 2008 budget request for FAA covering personnel compensation 
and benefits for aviation safety and operations, these workload and 
staffing challenges are critical to address. 

Hiring and Training Air Traffic Controllers Remains a Challenge: 

During the coming decade, FAA will need to hire and train thousands of 
air traffic controllers to replace those who will retire and leave for 
other reasons. FAA estimated it will lose 10,291 controllers, or about 
70 percent of the controller workforce, during fiscal years 2006 
through 2015, primarily due to retirements.[Footnote 9] To replace 
these controllers and accommodate increases in air traffic while 
accounting for expected productivity increases, FAA plans to hire a 
total of 11,800 new controllers from fiscal year 2006 through 2015. In 
fiscal year 2006, FAA hired 1,116 controllers. The Administration's 
budget for fiscal year 2008 proposes about $4.4 billion for salaries 
and benefits for the air traffic organization account, which includes 
FAA's large air traffic controller workforce. The fiscal year 2008 
proposal includes FAA's plans to hire 1,420 air traffic controllers, 
which would bring the total number of air traffic controllers to about 
15,000. Figure 3 shows the estimated losses each year as well as the 
number of planned hires. 

Figure 3: Estimated Controller Losses and Planned Hires, Fiscal Years 
2006-2016: 

[See PDF for Image] 

Source: FAA. 

Note: FAA established these hiring targets in its 2006 controller 
workforce plan. 

[End of figure] 

Recent events may exacerbate the hiring situation. Data indicate that 
controllers are retiring at a faster rate than FAA anticipated. FAA 
projected 341 retirements for fiscal year 2005; 465 controllers 
actually retired--36 percent more than FAA's estimate. Similarly, in 
fiscal year 2006, 25 percent more controllers retired than FAA 
projected.[Footnote 10] To meet its hiring target of 930 controllers in 
fiscal year 2006, FAA shifted about 200 of its planned hires from 
fiscal year 2007 to fiscal year 2006 by speeding up the initial 
screening and training process. According to FAA, it is on track to 
hire between 1,300 and 1,400 controllers in fiscal year 2007.[Footnote 
11] To keep on track, FAA has recently expanded its hiring sources, 
which had focused on individuals with prior FAA or Department of 
Defense (DOD) air traffic control experience and graduates from FAA's 
collegiate training initiative program, to include the general public. 
This strategy is needed, according to FAA officials, because DOD has 
recently become less of a hiring source for controllers due to military 
incentives for retaining controllers and higher salaries than FAA's 
entry-level salary.[Footnote 12] 

It is also important for FAA to ensure that air traffic control 
facilities have adequate staffing based on their unique traffic demands 
and the accuracy of FAA's retirement forecast. Historically, FAA has 
computed staffing standards, which are the number of controllers needed 
on a systemwide basis, but distribution of these totals to the facility 
level was a negotiated process. The staffing standards did not take 
into account the significant differences in complexity and workload 
among FAA's 300 terminal and enroute control facilities, which can lead 
to staffing imbalances. FAA has begun developing and implementing new 
staffing standards that use an algorithm that incorporates traffic 
levels and complexity of traffic at the facility level to determine the 
number of air traffic controllers needed, according to an FAA official. 
As FAA further refines its process for determining controller staffing 
needs, the ultimate objective is to assess the traffic level and 
complexity on a sector-by-sector basis to develop more accurate 
controller staffing requirements. This process is in the early stages 
of implementation and it is too early to assess the outcome. Such 
staffing standards for air traffic controllers as well as safety 
inspectors are important to ensure that FAA deploys its resources for 
fiscal year 2008 and later years in a cost-effective and risk-based 
manner. 

FAA Faces Challenges in Furthering and Institutionalizing Management 
Improvements While Moving Toward Implementing NextGen: 

FAA has made significant progress in implementing management processes 
that use leading practices of private sector businesses, but further 
work remains to fully address past problems. Historically, those 
problems included chronic cost and schedule difficulties associated 
with operating and modernizing the nation's air traffic control system 
as well as weaknesses in FAA's financial management. In 1995, we 
declared FAA's air traffic control modernization program a high-risk 
initiative because of its cost, complexity, and systemic management and 
acquisition problems. In 1999, we also placed FAA on the high-risk list 
for financial management, noting weaknesses that rendered the agency 
vulnerable to fraud, waste, and abuse by undermining its ability to 
manage operations and limiting the reliability of financial information 
provided to the Congress. FAA has made significant progress in both 
areas and we removed FAA's financial management from our high risk list 
in 2005. However, additional work is needed in managing its 
acquisitions and finances and is crucial to developing a sustainable 
capability for delivering priority systems on budget and on time. In 
addition, FAA, in partnership with other federal agencies, is embarking 
on the development of NextGen--one of the federal government's most 
complex and comprehensive undertakings in recent times. FAA faces 
challenges associated with moving forward from planning to implementing 
NextGen. 

Progress Has Been Made but Further Work Remains to Institutionalize 
Recent Management Improvements: 

FAA has taken actions to operate in a more business-like manner and 
enable the agency to more economically and efficiently manage the $14.1 
billion requested for its fiscal year 2008 budget. Since we designated 
FAA financial management as high-risk in 1999, FAA has made significant 
improvements, including implementing a new financial management system 
called Delphi[Footnote 13] and developing a cost accounting system. 
Additionally, FAA received unqualified opinions from auditors on its 
annual financial statements for fiscal years 2001 through 2005, in 
spite of material internal control weaknesses that the auditors 
identified. This progress led us to remove FAA financial management 
from our high risk list in 2005. 

Nonetheless, external auditors issued a qualified opinion on FAA's 
fiscal year 2006 financial statements for the first time since 2000 and 
repeated a material internal control weakness that was reported in 
2005. The opinion and internal control report stemmed from FAA's 
inability to support the accuracy and completeness of the construction- 
in-progress account, reported in the financial statements as $4.7 
billion. Difficulties with this account, which includes costs for 
projects such as radars, runway guidance systems, and aviation safety 
and security systems, have been a longstanding concern. FAA has begun 
work to address this problem. However, it will be important for FAA to 
develop a systematic solution to this problem, so that it does not 
recur. 

FAA's efforts towards improved financial management also include 
establishing a cost control and cost reduction program. According to 
agency officials, each line of business--such as FAA's Air Traffic 
Organization (ATO), which is responsible for managing and modernizing 
the air traffic control system--is annually required to propose at 
least one cost control initiative, and the Administrator tracks and 
reviews progress on these initiatives monthly. According to FAA, these 
initiatives have yielded a total of $99.1 million in cost savings and 
$81.9 million in cost avoidance for fiscal years 2005 and 2006. 
Additional cost control efforts include outsourcing flight service 
stations, which FAA estimates will save $2.2 billion over 10 years, and 
restructuring its administrative service areas from 9 separate offices 
to 3, which FAA estimates will save up to $460 million over 10 years. 
We have ongoing work that is assessing FAA's cost control strategy and 
identifying additional cost savings opportunities that may exist. For 
example, we have previously reported the need for FAA to pursue further 
cost control options, such as exploring additional opportunities for 
consolidating facilities and contracting out more of its 
services.[Footnote 14] 

FAA has taken steps to improve its software acquisition and investment 
management processes and for the last 3 years has reported meeting its 
cost and schedule targets for the acquisition of major system 
acquisitions, including air traffic control systems.[Footnote 15] These 
improvements are particularly important since FAA plans to spend about 
$9.4 billion from fiscal year 2007 through fiscal year 2011 to upgrade 
and replace air traffic control systems. To better manage its 
information technology investments, including its software intensive 
air traffic control systems, and address problems we have 
identified,[Footnote 16] FAA has changed its acquisition management 
guidance to require review of all investments--new systems as well as 
systems in service. In addition, FAA has established a cost estimating 
methodology for its investment. FAA has also developed and applied a 
process improvement model to assess the maturity of its software and 
systems capabilities resulting in, among other things, enhanced 
productivity and greater ability to predict schedules and resources. 
Further, FAA has made progress in expanding its enterprise 
architecture--a comprehensive guide to its plans for acquiring new 
systems--to include the initial requirements for NextGen. 

However, making further improvements and institutionalizing them 
throughout the agency will continue to be a challenge for FAA. For 
example, FAA's acquisition management guidance does not clearly 
indicate whether the reviews of in-service systems include 
reevaluations of projects' alignment with strategic goals and 
objectives, as we recommended. In addition, the agency has yet to 
implement its cost estimating methodology. Furthermore, FAA has not 
established a policy to require use of its process improvement model on 
all major acquisitions for the national air space system. Additionally, 
as FAA begins to detail the scope and system requirements of NextGen, 
it will be important to adapt and expand the enterprise architecture 
for the national air space system to guide these future plans. Until 
the agency fully addresses these residual issues, it will continue to 
risk program management problems affecting cost, schedule, and 
performance. With a multi-billion dollar acquisition budget, addressing 
these actions are as critical as ever. 

Institutionalizing these financial, acquisition, and information 
technology improvements will be a challenge for FAA, especially in view 
of the imminent departure of the Chief Operating Officer later this 
month and the departure of the Administrator, who will reach the end of 
her 5-year term this September. We have reported that the experiences 
of successful transformations and change management initiatives in 
large public and private organizations suggest that it can take 5 to 7 
years or more until such initiatives are fully implemented and cultures 
are transformed in a sustainable manner. Such changes require focused, 
full-time attention from senior leadership and a dedicated 
team.[Footnote 17] 

Progress Continues to Be Made in Planning for NextGen, but Challenges 
to Successful Implementation Remain: 

Work to determine the capabilities and requirements that will be needed 
for NextGen and to produce a comprehensive vision for that system is 
nearing completion; however, given the staggering complexity of this 
ambitious effort to modernize and transform the air traffic control 
system over the next two decades, it will not be easy to move from 
planning to implementation. To plan NextGen, Congress authorized the 
creation of the Joint Planning and Development Office (JPDO) in 2003. 
JDPO is housed within FAA and the Administration's fiscal year 2008 
budget includes $14.3 million to support JPDO. To carry out its 
planning function, JPDO is required to operate in conjunction with 
multiple government agencies.[Footnote 18] JPDO's approach requires 
unprecedented collaboration and consensus among many stakeholders-- 
federal and nonfederal--about necessary system capabilities, equipment, 
procedures, and regulations. Recently, JPDO has made progress in 
developing key planning documents, including a cost estimate for 
NextGen. However, as efforts move forward to implement NextGen, it will 
be important to identify the source and funding for completion of 
intermediate technology development and determine how FAA can best 
manage the complex implementation and integration of NextGen 
technologies. Without a timely transition to NextGen capabilities, JPDO 
officials estimate a future gap between the demand for air 
transportation and available capacity that could cost the U.S. economy 
billions of dollars annually. 

JPDO Has Made Progress toward Finalizing Key Planning Documents and 
Developing a Cost Estimate: 

FAA and the other JPDO partners have been working to refine the vision 
for NextGen and achieve a general consensus on that vision. The bulk of 
JPDO's planning has been to develop three critical documents--a concept 
of operations,[Footnote 19] enterprise architecture,[Footnote 20] and 
operational improvement roadmaps.[Footnote 21] Once these key documents 
are completed in the next few months, it will be important to 
synchronize them with partner agency planning documents, including 
FAA's implementation plan for NextGen--the Operational Evolution 
Partnership (OEP)--and to continue to use the documents to drive agency 
budget decisions. The OEP is intended as a comprehensive description of 
how the agency will implement NextGen, including the required 
technologies, procedures, and resources. JPDO is continuing to work 
with the Office of Management and Budget (OMB) to develop a unified, 
cross-agency program for NextGen funding requests. 

Given the criticality of NextGen, another important planning document-
-possibly the most important for Congress--is a comprehensive estimate 
of the costs to JPDO partner agencies, particularly FAA, for the 
required research, development, systems acquisitions, and systems 
integration. Such an estimate does not yet exist. As we reported in 
November 2006,[Footnote 22] a limited, preliminary cost estimate 
concluded that FAA's budget under a NextGen scenario would average 
about $15 billion per year through 2025, or about $1 billion more 
annually (in today's dollars) than FAA's fiscal year 2006 
appropriation.[Footnote 23] A JPDO official told us they have submitted 
a limited NextGen cost estimate to OMB with the 2008 budget request. As 
of February 9, 2007, JPDO had not publicly released its cost estimate 
for NextGen. According to the Department of Transportation, the 
Administration's budget for fiscal year 2008 includes $175 million to 
support key FAA investments in NextGen. 

According to JPDO officials, their current estimate focuses only on the 
near-term capital needs for FAA's ATO portfolio. To develop what they 
believed would be a more accurate cost estimate, JPDO also focused on 
the funding necessary to achieve only the capabilities of the NextGen 
system around 2016, rather than the long-term 2025 capabilities. JPDO 
then laid out the major systems and investments required by ATO to 
achieve the mid-term vision and the related costs for ATO. 

While JPDO's new estimate will be a step toward understanding the costs 
of NextGen, this estimate is still incomplete. Much work remains to 
develop a comprehensive cost estimate for NextGen that includes the 
costs to the rest of FAA (beyond ATO), the other JPDO partner agencies, 
and industry. A JPDO official told us the agency is working to develop 
a comprehensive estimate and plan to have one ready to submit with the 
2009 budget request. This comprehensive estimate is intended to 
describe the business case for NextGen and detail the investments that 
will be required by all the JPDO partner agencies to achieve the 
NextGen vision by 2025. 

Both JPDO and FAA Face Challenges as NextGen Moves from Planning to 
Implementation: 

The successful implementation of NextGen will depend, in part, on 
resolving the uncertainty over which entities will fund and conduct the 
research and development necessary to achieve some key NextGen 
capabilities and to support the operational roadmaps. In the past, a 
significant portion of aeronautics research and development, including 
intermediate technology development, has been performed by NASA. 
However, our analysis of NASA's aeronautics research budget and 
proposed funding shows a 30 percent decline, in constant 2005 dollars, 
from fiscal year 2005 to fiscal year 2011. To its credit, NASA plans to 
focus its research on the needs of NextGen. However, NASA is also 
moving toward a focus on fundamental research and away from 
developmental work and demonstration projects. FAA has determined that 
research gaps now exist as a result of both NASA's cuts to aeronautical 
research funding and the expanded requirements for NextGen coming from 
JPDO. These gaps are in the activities of applied research and 
development--activities that will be required to implement new 
policies, demonstrate new capabilities, set parameters for 
certification of new systems, and develop technologies for transfer to 
industry. 

It will be important for both FAA and JPDO to find ways, in the near 
term, to keep the necessary research and development on track to 
support implementation of NextGen by 2025. In 2006, officials from FAA 
and JPDO initiated an assessment of NextGen research and development 
requirements. Their goal was to identify specific research initiatives 
that were not currently funded, but which they said must be initiated 
no later than fiscal year 2009 to comply with the operational roadmaps. 
The preliminary findings from this assessment led to increased budget 
requests for FAA to help lessen the research and development gaps. 
However, JPDO officials noted that a research and development gap 
remains, with items in the research and development pipeline that need 
funding to take them from concept to development. Other options for 
addressing the gap are for JPDO and FAA to further explore ways to 
leverage the research being conducted in other agencies or to partner 
with industry or academia. For example, JPDO and FAA have already 
identified research within DOD on alternative fuels that, with a modest 
investment, could be leveraged to include civil aviation. Currently, it 
is unknown how all of the significant research and development 
activities inherent in the transition to NextGen will be conducted or 
funded. 

Another issue with regard to NextGen implementation will be FAA's 
ability to manage the systems acquisitions and integration needed to 
implement a system as broad and complex as NextGen. In the past, a lack 
of expertise contributed to weaknesses in FAA's management of air 
traffic control modernization efforts. Industry experts with whom we 
have spoken continue to question whether FAA will have the technical 
expertise needed to implement NextGen. In November, we recommended that 
FAA examine its strengths and weaknesses with regard to the technical 
expertise and contract management expertise that will be required to 
define, implement, and integrate the numerous complex programs inherent 
in the transition to NextGen.[Footnote 24] In response to our 
recommendation, FAA is considering convening a blue ribbon panel to 
study this issue and make recommendations to the agency about how to 
best proceed with its management and oversight of the implementation of 
NextGen. We believe that such a panel could help FAA begin to address 
this challenge. 

Funding Issues May Affect Airports' Investment and Other FAA Programs: 

As it modernizes the national airspace system to meet the nation's 
future air transportation needs, FAA must not only transform the air 
traffic control system, but also work with airport operators to provide 
increased capacity at airports to safely handle the projected growth in 
the demand for air travel. This latter responsibility will include 
overseeing airports' efforts to adapt their infrastructure to 
accommodate the introduction of very light jets, and in the case of the 
largest airports, the new large Airbus A380. Airports are an integral 
part of the nation's transportation system and maintaining their safety 
and efficiency is an important FAA responsibility. To this end, FAA 
administers the Airport Improvement Program (AIP), which provides 
federal funds for development projects at the entire range of the 
nation's 3,400 airports--from small general aviation airports to the 
very largest that handle several million passengers per year. The 
Administration has proposed cuts in AIP funding and is considering 
possible changes to the AIP allocation formula as well as increasing 
the cap on passenger facility charges[Footnote 25] for airport 
development projects. Any change in the level or allocation of these 
funds could have implications for funding airport capital projects. Not 
only AIP grants but also portions of other FAA programs receive funds 
from the Airport and Airway Trust Fund, which is largely financed by 
excise taxes on ticket purchases by airline passengers and aviation 
fuel. Since these taxes are scheduled to expire at the end of September 
2007, ensuring that there is no lapse in revenue to the trust fund will 
require Congressional action.[Footnote 26] Without a continued flow of 
funds to the trust fund, FAA's ability to carry out AIP and other 
programs during fiscal year 2008 may be in jeopardy. 

FAA's Recent Estimate of Planned Capital Development Similar to Past 
Estimate: 

FAA estimates the total cost for planned airport projects that are 
eligible for AIP funding, including runways, taxiways, and noise 
mitigation and reduction efforts, will be about $42 billion for fiscal 
years 2007 through 2011.[Footnote 27] This estimate is little changed 
from the agency's last estimate in 2004 for the period 2005 to 2009. 
FAA's current estimate indicates that over half of the planned 
development will occur at large and medium hub airports.[Footnote 28] 
The Airports Council International--North America (ACI-NA) also 
provides estimates of planned airport development. ACI-NA includes both 
AIP-eligible projects and ineligible projects and, as a result, has 
higher estimates. 

Historically, airports have received funding for capital development 
from a variety of sources. As we reported in 2003, the single largest 
source of financing for airports is tax-exempt bonds, followed by AIP 
grants and passenger facility charges. Tax exempt bonds are currently 
supported by airport revenue and, in some cases, by passenger facility 
charges. Access to these funding sources varies according to airports' 
size and funding capabilities. Large and medium hub airports depend 
primarily on tax-exempt bonds, while the smaller airports rely 
principally on AIP grants.[Footnote 29] Passenger facility charges are 
a particularly important source of capital for large and medium hub 
airports because they have the majority of commercial service 
passengers. 

FAA Funding Proposals Would Change How Airport Development is Financed: 

The Administration has proposed changing the federal role in financing 
airport development in its fiscal year 2008 budget proposal, which also 
includes a reauthorization proposal for FAA that will be submitted 
later this month. Funding for AIP grants would be reduced and the 
allocation formula changed. The Administration's reauthorization 
proposal is expected to provide details on these proposed changes. It 
is, therefore, currently unclear how a number of issues will be 
addressed. 

The reauthorization proposal may clarify the impact on smaller 
airports,[Footnote 30] which received about two-thirds of AIP grants in 
fiscal year 2004. As noted earlier in my statement, smaller airports 
rely primarily on AIP grants for capital funding. In recent years, 
statutory changes in the distribution of AIP grants have increased the 
share to smaller airports.[Footnote 31] However, under the fiscal year 
2008 budget proposal, funding changes would especially impact smaller 
airports if the current allocation formulas are unchanged in the 
forthcoming reauthorization proposal. First, primary airport 
entitlements[Footnote 32] under AIP would be cut in half from the 
fiscal year 2006 level. In turn, the small airport fund, which is 
funded from AIP entitlement amounts that large and medium hub airports 
must turn back if they impose passenger facility charges,[Footnote 33] 
would also be reduced by half. Second, state entitlements for non- 
primary[Footnote 34] commercial service and general aviation airports 
would be reduced from 20 percent to 18.5 percent of total AIP 
obligations. Finally, discretionary set aside grants for reliever 
airports would be eliminated under the fiscal year 2008 budget 
proposal. Table 1 shows the effect on the amounts available for various 
types of AIP grants at different funding levels including the $2.75 
billion requested in the Administration's budget and the actual funding 
level for fiscal year 2006. 

Table 1: Estimated AIP Distribution Under Alternative Funding Levels 
(in millions): 

Primary airports entitlements; 
Alternative funding levels: $2,750 (proposed FY 2008): $496.0; 
Alternative funding levels: $3,000: $496.0; 
Alternative funding levels: $3,250: $857.7;  
Alternative funding levels: $3,550 (actual FY 2006): $888.0. 

Entitlements for non-primary, general aviation and reliever airports; 
Alternative funding levels: $2,750 (proposed FY 2008): $487.9; 
Alternative funding levels: $3,000: $534.1; 
Alternative funding levels: $3,250: $242.0;  
Alternative funding levels: $3,550 (actual FY 2006): $299.5. 

Other entitlements[A]; 
Alternative funding levels: $2,750 (proposed FY 2008): $103.0; 
Alternative funding levels: $3,000: $111.8; 
Alternative funding levels: $3,250: $516.5;  
Alternative funding levels: $3,550 (actual FY 2006): $526.6. 

Carryover entitlements[B]; 
Alternative funding levels: $2,750 (proposed FY 2008): $447.8; 
Alternative funding levels: $3,000: $447.8; 
Alternative funding levels: $3,250: $447.8;  
Alternative funding levels: $3,550 (actual FY 2006): $431.7. 

Small airport fund; 
Alternative funding levels: $2,750 (proposed FY 2008): $214.2; 
Alternative funding levels: $3,000: $214.2; 
Alternative funding levels: $3,250: $428.4;  
Alternative funding levels: $3,550 (actual FY 2006): $428.4. 

Discretionary set aside grants for reliever airports; 
Alternative funding levels: $2,750 (proposed FY 2008): $0.0; 
Alternative funding levels: $3,000: $0.0; 
Alternative funding levels: $3,250: $4.3;  
Alternative funding levels: $3,550 (actual FY 2006): $5.6. 

All other discretionary and set aside grants[C]; 
Alternative funding levels: $2,750 (proposed FY 2008): $888.3; 
Alternative funding levels: $3,000: $1,083.3; 
Alternative funding levels: $3,250: $640.4;  
Alternative funding levels: $3,550 (actual FY 2006): $844.6. 

Total AIP funds available for grants[D]; 
Alternative funding levels: $2,750 (proposed FY 2008): $2,637.3; 
Alternative funding levels: $3,000: $2,887.2; 
Alternative funding levels: $3,250: $3,137.1;  
Alternative funding levels: $3,550 (actual FY 2006): $3,424.4. 

Source: FAA. 

[A] Includes grants for Alaskan airports and cargo service airports. 

[B] Funds that some airports can claim to use in the fiscal year in 
which the amount was apportioned and two fiscal years immediately after 
that year. 

[C] Funds that are available for use on AIP eligible projects at FAA's 
discretion. This includes funds set aside for such things as noise 
planning and programming, reliever airports and capacity, safety, 
security, and noise projects. It also includes discretionary grants 
that can be used for any AIP eligible project at any airport. 

[D] The funding available for grants after the 2006 rescission and 
deductions for airport research, other programs, and administrative 
costs. 

[End of table]  

To help offset any reductions in AIP grants, FAA is also considering 
allowing airports to collect more revenue from passenger facility 
charges, which large airports generally prefer. Airlines, however, have 
been generally opposed to an increase in these charges because they 
have little control in how passenger facility charges are spent and 
because they believe these charges reduce passenger demand for air 
travel. Nonetheless, if airports were to increase charges, additional 
airport revenue could be generated. Increasing the cap on passenger 
facilities charges would primarily benefit larger airports because 
these charges are a function of passenger traffic. However, as already 
noted, under AIP, large airports that collect passenger facility 
charges must forfeit a certain percentage of their AIP formula funds. 
These forfeited funds are subsequently divided between the small 
airport fund, which is to receive 87.5 percent, and the discretionary 
fund, which is to receive 12.5 percent. Thus, under current law, 
smaller airports would benefit indirectly from any increases in 
passenger facility charges and help offset reductions in AIP funding. 

FAA and the Congress Will Face a Challenge Funding FAA Programs in 
Fiscal Year 2008 if Reauthorization is Not Timely: 

With the excise taxes that fund the Airport and Airway Trust Fund 
scheduled to expire at the end of fiscal year 2007, Congress will need 
to act if there is to be no lapse in revenue to the trust fund to fund 
FAA. If the taxes are neither reauthorized by that time nor replaced by 
other revenue sources for the trust fund, the only revenues to the 
trust fund will be interest earned on the fund's cash balance. FAA 
estimates that two previous lapses in 1996-1997 resulted in the trust 
fund not receiving about $5 billion in revenue. 

As of the end of fiscal year 2006, the trust fund's uncommitted 
balance--surplus revenues in the trust fund against which no 
commitments, in the form of budget authority, have been made--was less 
than $2 billion. The Administration's budget proposal projects that the 
uncommitted balance will be about $2 billion at the end of fiscal year 
2007. If today's level of monthly tax revenue continues, a 2-to 3-month 
lapse in fiscal year 2008 could reduce the revenue to the trust fund 
enough to cause the uncommitted balance to fall to zero in fiscal year 
2008. Most of FAA's funding comes from the trust fund--the fiscal year 
2008 budget request for FAA proposes about 80 percent of the agency's 
funding from the trust fund with the remainder from the general fund. 
If the trust fund balance falls to zero, continuation of FAA's 
programs--including efforts to address some of the safety and 
management challenges that I have discussed--would depend on providing 
additional general revenues. 

GAO Contact and Staff Acknowledgements: 

For further information on this testimony, please contact Dr. Gerald L. 
Dillingham at (202) 512-2834 or dillinghamg@gao.gov. Individuals making 
key contributions to this testimony include Paul Aussendorf, Jay 
Cherlow, Jessica Evans, Colin Fallon, Carol Henn, Ed Laughlin, Ed 
Menoche, Faye Morrison, Colleen Phillips, Taylor Reeves, Richard Scott, 
Teresa Spisak, and Larry Thomas. 

(540144): 

FOOTNOTES 

[1] GAO, Fiscal Stewardship: A Critical Challenge Facing Our Nation, 
GAO-07-362SP (Washington, D.C.: January 2007). 

[2] GAO, High Risk Series: An Update, GAO-07-310 (Washington, D.C.: 
January 2007). 

[3] NTSB, Current Procedures for Collecting and Reporting U.S. General 
Aviation Accident and Activity Data (Washington, D.C.: April 2005). 

[4] In fiscal year 2006, FAA made changes to its survey, increasing the 
sample size from 30,000 to 75,000 and, according to the agency, 
responses increased from 15,000 to 32,000. However, the response rate 
still remains low. 

[5] Participants in the Aviation Safety Action Program include 
employees of air carriers and repair station; participant in the 
Aviation Safety Reporting Program include all users of the national 
airspace system, including air traffic controllers; participants in the 
Voluntary Disclosure Reporting Program include air carriers, repair 
stations, and aviation manufacturers. 

[6] GAO, Aviation Safety: Better Management Controls are Needed to 
Improve FAA's Safety Enforcement and Compliance Efforts, GAO-04-646 
(Washington, D.C.: July 6, 2004). 

[7] GAO, Aviation Safety: System Safety Approach Needs Further 
Integration into FAA's Oversight of Airlines, GAO-05-726 (Washington, 
D.C.: Sept. 28, 2005). 

[8] National Research Council, Staffing Standards for Aviation Safety 
Inspectors (Washington, D.C.: The National Academies Press, 2006). 

[9] The high percentage of retirements is attributable to the 1981 
controller strike, when President Ronald Reagan fired over 10,000 air 
traffic controllers, and the consequent need to quickly rebuild the 
controller workforce. From 1982 through 1991, FAA hired an average of 
2,655 controllers per year. These controllers will become eligible for 
retirement during the next decade. 

[10] FAA estimated 467 retirements in fiscal year 2006 and 583 
controllers actually retired. 

[11] FAA originally planned to hire 1,136 controllers in fiscal year 
2007 as shown in figure 3. In January 2007, FAA revised that hiring 
target to 1,386. 

[12] Under FAA's recent contract with air traffic controllers, most 
current controllers continued to receive their existing base salaries 
and benefits, while new controllers are hired at lower wages. 

[13] Delphi is a commercial off-the-shelf financial management system 
that was acquired by the Department of Transportation and fully 
implemented in FAA in 2003. 

[14] GAO, National Airspace System: Transformation will Require 
Cultural Change, Balanced Funding Priorities, and Use of All Available 
Management Tools, GAO-06-154 (Washington, D.C.: Oct. 14, 2005). 

[15] We have on-going work examining FAA's procedures for measuring its 
acquisition performance. 

[16] GAO, Federal Aviation Administration: Stronger Architecture 
Program Needed to Guide Systems Modernization Efforts, GAO-05-266 
(Washington, D.C.: Apr. 29, 2005); GAO, Air Traffic Control: System 
Management Capabilities Improved, but More can be Done to 
Institutionalize Improvements, GAO-04-901, (Washington, D.C.: Aug. 20, 
2004); and GAO, Information Technology: FAA Has Many Investment 
Management Capabilities in Place, but More Oversight of Operational 
Systems is Needed, GAO-04-822, (Washington, D.C.: Aug. 20, 2004). 

[17] GAO-06-154. 

[18] In addition to FAA, these agencies include the Departments of 
Transportation, Commerce, Defense, and Homeland Security; the National 
Aeronautics and Space Administration (NASA); and the White House Office 
of Science and Technology Policy. 

[19] The concept of operations describes how the transformational 
elements of NextGen will operate in 2025. It is intended to establish 
general stakeholder buy-in to the NextGen end state, transition path, 
and business case. 

[20] The enterprise architecture follows from the concept of operations 
and describes the system in more detail (using federal enterprise 
architecture and DOD enterprise architecture frameworks). It will be 
used to integrate planning efforts and drive partner agency guidance. 

[21] The operational improvement roadmaps lay out a timeline for 
deploying and integrating NextGen systems. 

[22] GAO, Next Generation Air Transportation System: Progress and 
Challenges Associated with the Transformation of the National Airspace 
System, GAO-07-25 (Washington, D.C.: Nov. 13, 2006). 

[23] This preliminary estimate--developed by the Research, Engineering 
and Development Advisory Committee, an advisory committee to FAA-- 
indicates that the cost for a status quo scenario (i.e., no NextGen) 
would also be about $15 billion per year through 2025. This is due 
primarily to the expectation that, under the NextGen scenario, capital 
expenditures would be higher than under the status quo scenario in the 
near term, but operations costs would be lower because of productivity 
improvements in the longer term. 

[24] GAO-07-25. 

[25] Passenger facility charges are fees airports can charge passengers 
to fund FAA approved projects. 

[26] Congress also would need to renew FAA's authority to spend from 
the trust fund. 

[27] FAA's estimate, in nominal dollars, is based on the agency's 
National Plan of Integrated Airport Systems, which FAA published in 
September 2006. 

[28] Commercial service airports are categorized by the number of 
enplanements. Large hubs are those airports that account for at least 
one percent of total passenger enplanements. Medium hubs account for 
between 0.25 and 1 percent of total passenger enplanements. 

[29] Any increase in the issuance of bonds exempt from federal taxation 
has an impact on federal revenue. 

[30] Smaller airports include small hub, nonhub, other commercial 
service, reliever (high capacity general aviation airports in major 
metropolitan areas that provide pilots with an alternative to using 
congested hub airports) and general aviation airports. 

[31] For example, FAA's 2000 authorization (Pub. L. No. 106-181) 
boosted funding for nonprimary airports and small primary airports by 
increasing the portion of AIP passenger entitlement funds that must be 
turned back by large and medium hub airports. Under AIP, airports that 
collect passenger facility charges must forfeit a certain percentage of 
their AIP entitlement funds, which are then distributed to smaller 
airports. In fiscal year 2004, smaller airports received a total of 
about $380 million as a result of these turn backs. 

[32] Entitlements are AIP funds apportioned to airport sponsors and 
states for eligible projects based on formulas. 

[33] Small airport fund grants must be spent at small hub primary 
airports, general aviation airports (including reliever airports), and 
nonhub commercial airports. 

[34] Non-primary airports are commercial service airports that have 
from 2,500 to 10,000 annual passenger enplanements. These airports are 
used mainly by general aviation. 

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