[Federal Register: February 15, 2005 (Volume 70, Number 30)]
[Proposed Rules]
[Page 7674-7676]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr15fe05-15]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2005-20353; Directorate Identifier 2004-NM-255-AD]
RIN 2120-AA64
Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional
Jet Series 100 & 440) Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 &
440) airplanes. This proposed AD would require installing additional
shielding of the hydraulic lines in the wing box area. This proposed AD
is prompted by the determination that the additional hydraulic line
shields will protect the lines from possible impact by tire debris if
the tire tread fails. We are proposing this AD to prevent damage to the
hydraulic lines and subsequent leakage from the two hydraulic systems,
which could result in loss of braking capability on the affected side
of the airplane, asymmetrical braking, and reduced directional
control--particularly during a rejected takeoff.
DATES: We must receive comments on this proposed AD by March 17, 2005.
ADDRESSES: Use one of the following addresses to submit comments on
this proposed AD.
DOT Docket Web site: Go to http://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to http://www.regulations.gov
and follow the instructions for sending your
comments electronically.
Mail: Docket Management Facility, U.S. Department of
Transportation, 400 Seventh Street SW., Nassif Building, Room PL-401,
Washington, DC 20590.
By fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building, 400 Seventh Street SW., Washington, DC, between 9 a.m.
and 5 p.m., Monday through Friday, except Federal holidays.
[[Page 7675]]
For service information identified in this proposed AD, contact
Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station
Centre-ville, Montreal, Quebec H3C 3G9, Canada.
You can examine the contents of this AD docket on the Internet at
http://dms.dot.gov, or in person at the Docket Management Facility,
U.S. Department of Transportation, 400 Seventh Street SW., room PL-401,
on the plaza level of the Nassif Building, Washington, DC. This docket
number is FAA-2005-20353; the directorate identifier for this docket is
2004-NM-255-AD.
FOR FURTHER INFORMATION CONTACT: Daniel Parillo, Aerospace Engineer,
Systems and Flight Test Branch, ANE-172, FAA, New York Aircraft
Certification Office, 1600 Stewart Avenue, suite 410, Westbury, New
York 11590; telephone (516) 228-7305; fax (516) 794-5531.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to submit any relevant written data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed under ADDRESSES. Include ``Docket No. FAA-2005-20353;
Directorate Identifier 2004-NM-255-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 submitted 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://dms.dot.gov
, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this proposed AD. Using the search function of our
docket Web site, anyone can find and read the comments in any of our
dockets, including the name of the individual who sent the comment (or
signed the comment on behalf of an association, business, labor union,
etc.). You can review the DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78), or you
can visit http://dms.dot.gov.
Examining the Docket
You can examine the AD docket on the Internet at http://dms.dot.gov
, or in person at the Docket Management Facility office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the DOT
street address stated in the ADDRESSES section. Comments will be
available in the AD docket shortly after the DMS receives them.
Discussion
Transport Canada Civil Aviation (TCCA), which is the airworthiness
authority for Canada, notified us that an unsafe condition may exist on
certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440)
airplanes. TCCA advises that additional shielding of the hydraulic
lines in the wing box area is necessary to protect the lines from
possible impact by tire debris if the tire tread fails. If both lines
have enough damage to cause leakage from the two hydraulic systems,
braking capability on the affected side of the airplane would be lost,
resulting in asymmetrical braking and reduced directional control--
particularly during a rejected takeoff.
Relevant Service Information
The manufacturer has issued Bombardier Service Bulletin 601R-57-
021, Revision ``C,'' dated February 23, 2004. The service bulletin
describes procedures for installing additional hydraulic line shields
to cover exposed hydraulic lines on both sides of the wing box area.
The procedures also include replacing the left and right inboard brake
lines with new lines to eliminate fouling of the lines with the shield.
Accomplishing the actions specified in the service information is
intended to adequately address the unsafe condition. TCCA mandated the
service information and issued Canadian airworthiness directive CF-
2004-20, dated October 5, 2004, to ensure the continued airworthiness
of these airplanes in Canada.
FAA's Determination and Requirements of the Proposed AD
This airplane model is manufactured in Canada and is type
certificated for operation in the United States under the provisions of
Sec. 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the
applicable bilateral airworthiness agreement. Pursuant to this
bilateral airworthiness agreement, TCCA has kept the FAA informed of
the situation described above. We have examined TCCA's findings,
evaluated all pertinent information, and determined that we need to
issue an AD for products of this type design that are certificated for
operation in the United States.
Therefore, we are proposing this AD, which would require
accomplishing the actions specified in the service information
described previously.
Costs of Compliance
The following table provides the estimated costs for U.S. operators
to comply with this proposed AD.
Estimated Costs
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Number of U.S.-
Action Work hours Average labor Parts Cost per airplane registered Fleet cost
rate per hour airplanes
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Shield installation................... 16 $65 $0 $1,040 91 $94,640
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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 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
[[Page 7676]]
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. See the ADDRESSES section for a location
to examine the regulatory evaluation.
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
airworthiness directive (AD):
Bombardier, Inc. (Formerly Canadair): Docket No. FAA-2005-20353;
Directorate Identifier 2004-NM-255-AD.
Comments Due Date
(a) The Federal Aviation Administration must receive comments on
this AD action by March 17, 2005.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier Model CL-600-2B19 (Regional
Jet series 100 & 440) airplanes, certificated in any category,
serial numbers 7003 through 7067 inclusive, 7069 through 7165
inclusive, 7167 through 7169 inclusive, and 7171 through 7188
inclusive.
Unsafe Condition
(d) This AD was prompted by the determination that additional
shielding of the hydraulic lines in the wing box area will protect
the lines from possible impact by tire debris if the tire tread
fails. We are proposing this AD to prevent damage to the hydraulic
lines and subsequent leakage from the two hydraulic systems, which
could result in loss of braking capability on the affected side of
the airplane, asymmetrical braking, and reduced directional
control--particularly during a rejected takeoff.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Installation of Hydraulic Line Shields
(f) Within 24 months after the effective date of this AD,
install additional shielding of the hydraulic lines in the wing box
area, by doing all the actions specified in the Accomplishment
Instructions of Bombardier Service Bulletin 601R-57-021, Revision
`C,' dated February 23, 2004.
(g) We also consider the requirements of paragraph (f) of this
AD to be met if the installation is done before the effective date
of this AD in accordance with Bombardier Service Bulletin 601R-57-
021, Revision `B,' dated July 18, 2001.
Alternative Methods of Compliance (AMOCs)
(h) The Manager, New York Aircraft Certification Office, FAA,
has the authority to approve AMOCs for this AD, if requested in
accordance with the procedures found in 14 CFR 39.19.
Related Information
(i) Canadian airworthiness directive CF-2004-20, dated October
5, 2004, also addresses the subject of this AD.
Issued in Renton, Washington, on February 6, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-2841 Filed 2-14-05; 8:45 am]
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