[Federal Register: October 26, 2007 (Volume 72, Number 207)]
[Proposed Rules]
[Page 60790-60793]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr26oc07-18]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-28956; Directorate Identifier 2007-CE-068-AD]
RIN 2120-AA64
Airworthiness Directives; Cessna Aircraft Company Models 525,
525A, and 525B Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain Cessna Aircraft Company (Cessna) Models 525, 525A, and 525B
airplanes. This proposed AD would require you to inspect the lower wing
skin structure, forward wing spar, lower fuselage skin, fairings, and
the external fairing frames for corrosion; repair any damage found;
apply a corrosion inhibitive sealant to the fuselage fairings before
reinstalling; and disable the cockpit mounted pilot relief tube. This
proposed AD results from leaking of the cockpit mounted pilot relief
tube, which caused corrosion of the airplane structure. We are
proposing this AD to detect and correct any damage from corrosion of
the airplane structure. Corrosion of the airplane structure could cause
structural degradation and lead to structural failure of the airplane
with consequent loss of control.
DATES: We must receive comments on this proposed AD by December 26,
2007.
ADDRESSES: Use one of the following addresses to comment on this
proposed AD:
Federal eRulemaking Portal: Go to http://www.regulations.gov.
Follow the instructions for submitting comments.
Fax: (202) 493-2251.
[[Page 60791]]
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590.
Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
For service information identified in this proposed AD, contact
Cessna Aircraft Company, Citation Marketing Division, P.O. 7706,
Wichita, Kansas 67277; telephone: 1-800-835-4090; fax: 1-800-517-8500.
FOR FURTHER INFORMATION CONTACT: T.N. Baktha, Aerospace Engineer, 1801
Airport Road, Room 100, Wichita, Kansas 67209; telephone: (316) 946-
4155; fax: (316) 946-4107.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include the docket number, ``FAA-
2007-28956; Directorate Identifier 2007-CE-068-AD'' at the beginning of
your comments. We specifically invite comments on the overall
regulatory, economic, environmental, and energy aspects of the proposed
AD. We will consider all comments received by the closing date and may
amend the proposed AD in light of those comments.
We will post all comments we receive, without change, to http://www.regulations.gov
, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive concerning this proposed AD.
Discussion
Cessna reported wing skin corrosion in a Model 525 and belly skin
corrosion in several Model 525A airplanes. Cessna received information
on more than 18 cases of significant corrosion. Cessna also received
information on 42 cases of some corrosion on Models 525, 525A, and 525B
airplanes. Corrosive fluids leaked after use of the cockpit mounted
pilot relief tube and caused corrosion of the fuselage skins, fairings,
fairing support structure, and wing structure.
This condition, if not corrected, could result in structural
degradation and lead to structural failure of the airplane with
consequent loss of control.
Relevant Service Information
We have reviewed the following Cessna service information for this
AD:
Service Bulletin SB525-53-20, dated April 30, 2007;
Service Bulletin SB525A-53-01, dated April 30, 2007;
Service Bulletin SB525B-53-01, dated April 30, 2007;
Alert Service Letter ASL525-53-04, Revision 2, dated
August 19, 2007;
Alert Service Letter ASL525A-53-05, Revision 2, dated July
25, 2007; and
Alert Service Letter ASL525B-53-02, Revision 2, dated July
25, 2007.
The service information describes procedures for the following
actions:
Inspecting the lower wing skin structure, forward wing
spars, lower fuselage skin, fairings, and external fairing frames for
corrosion;
Repairing corrosion by blending within specified limits or
by contacting the manufacturer to obtain an FAA-approved repair scheme
if corrosion damage can not be repaired within the limits specified;
Doing a surface eddy current inspection or a dye-penetrant
inspection on the repaired blended areas for cracks, and contacting the
manufacturer to obtain an FAA-approved repair scheme if cracks are
found;
Applying a corrosion inhibitive sealant to the fuselage
fairings before reinstalling; and
Disabling the cockpit mounted relief tube.
FAA's Determination and Requirements of the Proposed AD
We are proposing this AD because we evaluated all information and
determined the unsafe condition described previously is likely to exist
or develop on other products of the same type design. This proposed AD
would require you to inspect the lower wing skin structure, forward
wing spar, lower fuselage skin, fairings, and the external fairing
frames for corrosion; repair any damage found; apply a corrosion
inhibitive sealant to the fuselage fairings before reinstalling; and
disable the cockpit mounted pilot relief tube.
Costs of Compliance
We estimate that this proposed AD would affect 261 airplanes in the
U.S. registry.
We estimate the following costs to do the proposed inspection:
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Total cost per Total cost on
Labor cost Parts cost airplane U.S. operators
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80 work-hours x $80 per hour = $6,400......... Not Applicable.................. $6,400 $1,670,400
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We have no way of determining the number of airplanes that may need
repair or further inspection based on the results of the proposed
inspection, or the costs associated with such repair or inspection.
We estimate the following costs to do the proposed disabling of the
cockpit mounted pilot relief tube:
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Total cost per Total cost on
Labor cost Parts cost airplane U.S. operators
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.5 work-hours x $80 per hour = $40............ Not Applicable.................. $40 $10,440
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Cessna will provide warranty credit to the extent specified in
Cessna Citation Service Bulletin SB525-53-20, dated April 30, 2007;
Service Bulletin SB525A-53-01, dated April 30, 2007; Service Bulletin
SB525B-53-01, dated April 30, 2007; Alert Service Letter ASL525-53-04,
Revision 2, dated August 19, 2007; Alert Service Letter ASL525A-53-05,
Revision 2, dated July 25, 2007; and Alert Service Letter ASL525B-53-
02, Revision 2, dated July 25, 2007.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, Section 106, describes the
authority of the FAA Administrator. Subtitle VII, Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701, ``General
requirements.'' Under that
[[Page 60792]]
section, Congress charges the FAA with promoting safe flight of civil
aircraft in air commerce by prescribing regulations for practices,
methods, and procedures the Administrator finds necessary for safety in
air commerce. This regulation is within the scope of that authority
because it addresses an unsafe condition that is likely to exist or
develop on products identified in this rulemaking action.
Regulatory Findings
We have determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that the proposed
regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979); and
3. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD and placed it in the AD docket.
Examining the AD Docket
You may examine the AD docket that contains the proposed AD, the
regulatory evaluation, any comments received, and other information on
the Internet at http://www.regulations.gov; or in person at the Docket
Management Facility between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The Docket Office (telephone (800) 647-5527)
is located at the street address stated in the ADDRESSES section.
Comments will be available in the AD docket shortly after receipt.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new AD:
Cessna Aircraft Company: Docket No. FAA-2007-28956; Directorate
Identifier 2007-CE-068-AD.
Comments Due Date
(a) We must receive comments on this airworthiness directive
(AD) action by December 26, 2007.
Affected ADs
(b) None.
Applicability
(c) This AD applies to the following airplane models and serial
numbers that have a cockpit mounted pilot relief tube installed and
are certificated in any category:
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Models Serial Nos.
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(1) 525............................. 0001 through 0637.
(2) 525A............................ 0001 through 0347.
(3) 525B............................ 0001 through 0152.
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Unsafe Condition
(d) This AD results from leaking of the pilot relief tube, which
caused corrosion of the airplane structure. We are issuing this AD
to detect and correct any damage from corrosion on the airplane
structure. Corrosion of the airplane structure could cause
structural degradation and lead to structural failure of the
airplane with consequent loss of control.
Compliance
(e) To address this problem, you must do the following, unless
already done:
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Actions Compliance Procedures
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(1) Inspect the lower wing skin Within the next 90 Follow Cessna
structure, forward wing spars, days after the Citation Alert
lower fuselage skin, fairings, effective date of Service Letter
and external fairing frames for this AD. ASL525-53-04,
corrosion. Revision 2, dated
August 19, 2007;
Alert Service
Letter ASL525A-53-
05, Revision 2,
dated July 25,
2007; or Alert
Service Letter
ASL525B-53-02,
Revision 2, dated
July 25, 2007.
(2) If corrosion damage is found Before further Follow Cessna
in the lower wing skin flight after the Citation Alert
structure, forward wing spars, inspection Service Letter
lower fuselage skin, fairings, required in ASL525-53-04,
and external fairing frames paragraph (e)(1) Revision 2, dated
during the inspection required of this AD. August 19, 2007;
in paragraph (e)(1) of this AD, Alert Service
repair as specified in the Letter ASL525A-53-
applicable service information. 05, Revision 2,
If the corrosion damage can not dated July 25,
be repaired within the limits 2007; or Alert
specified in the applicable Service Letter
service information, contact ASL525B-53-02,
the manufacturer at 1-800-835- Revision 2, dated
4090 for an FAA-approved repair July 25, 2007.
scheme and incorporate this
repair.
(3) If corrosion on the lower Before further Follow Cessna
wing skin structure, forward flight after the Citation Alert
wing spars, and lower fuselage repair by Service Letter
skin was repaired by blending blending was done ASL525-53-04,
within the limits specified in as specified in Revision 2, dated
the service information, do a paragraph (e)(2) August 19, 2007;
surface eddy current inspection of this AD. Alert Service
or a dye-penetrant inspection Letter ASL525A-53-
for cracks. 05, Revision 2,
dated July 25,
2007; or Alert
Service Letter
ASL525B-53-02,
Revision 2, dated
July 25, 2007.
(4) If cracks are found during Before further Contact Cessna
the surface eddy current flight after the Aircraft Company,
inspection or the dye-penetrant inspection Citation Customer
inspection required in required in Support at 1-800-
paragraph (e)(3) of this AD, paragraph (e)(3) 835-4090.
contact the manufacturer for an of this AD.
FAA-approved repair scheme and
incorporate this repair.
[[Page 60793]]
(5) Install the fuselage Before further Follow Cessna
fairings and apply corrosion flight after the Citation Alert
inhibitive sealant. inspection Service Letter
required in ASL525-53-04,
paragraph (e)(1) Revision 2, dated
of this AD if no August 19, 2007;
corrosion was Alert Service
found; or before Letter ASL525A-53-
further flight 05, Revision 2,
after doing the dated July 25,
repairs and 2007; or Alert
inspections Service Letter
required in ASL525B-53-02,
paragraphs Revision 2, dated
(e)(2), (e)(3), July 25, 2007.
and (e)(4) of
this AD if
corrosion or
cracks were found.
(6) Determine the type of Within the next 90 Cessna Citation
installation of the cockpit days after the Service Bulletin
mounted pilot relief tube and effective date of SB525-53-20,
disable the relief tube. this AD. dated April 30,
2007; Service
Bulletin SB525A-
53-01, dated
April 30, 2007;
or Service
Bulletin SB525B-
53-01, dated
April 30, 2007.
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Alternative Methods of Compliance (AMOCs)
(f) The Manager, Wichita Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19. Send information to
ATTN: T.N. Baktha, Wichita ACO, Aerospace Engineer, 1801 Airport
Road, Room 100, Wichita, Kansas 67209; telephone: (316) 946-4155;
fax: (316) 946-4107. Before using any approved AMOC on any airplane
to which the AMOC applies, notify your appropriate principal
inspector (PI) in the FAA Flight Standards District Office (FSDO),
or lacking a PI, your local FSDO.
Related Information
(g) To get copies of the service information referenced in this
AD, contact Cessna Aircraft Company, Citation Marketing Division,
P.O. 7706, Wichita, Kansas 67277; telephone: 1-800-835-4090; fax: 1-
800-517-8500. To view the AD docket, go to U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590, or
on the Internet at http://www.regulations.gov. The docket number is
Docket No. FAA-2007-28956; Directorate Identifier 2007-CE-068-AD.
Issued in Kansas City, Missouri, on October 22, 2007.
James E. Jackson,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E7-21127 Filed 10-25-07; 8:45 am]
BILLING CODE 4910-13-P