[Federal Register: December 11, 2008 (Volume 73, Number 239)]
[Rules and Regulations]
[Page 75312-75314]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr11de08-3]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2008-1007; Directorate Identifier 2008-NM-135-AD;
Amendment 39-15761; AD 2008-25-03]
RIN 2120-AA64
Airworthiness Directives; Bombardier Model CL-600-2C10 (Regional
Jet Series 700, 701 & 702) Airplanes and Model CL-600-2D24 (Regional
Jet Series 900) Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: We are adopting a new airworthiness directive (AD) for the
products listed above. This AD results from mandatory continuing
airworthiness information (MCAI) originated by an aviation authority of
another country to identify and correct an unsafe condition on an
aviation product. The MCAI describes the unsafe condition as:
Bombardier Aerospace has completed a system safety review of the
CL-600-2C10/CL-600-2D24 aircraft fuel system against new fuel tank
safety standards. * * *
The assessment showed that due to the close proximity of
intrinsically safe fuel system wiring with other wiring, a single
failure from wire chafing at various locations of the fuselage could
result in an ignition source inside the fuel tank. In addition,
chafing of the temperature sensor wiring against the high power
wiring in the avionics compartment could lead to overheating of the
temperature sensor and hot surface ignition. The presence of an
ignition source inside the fuel tank could result in a fuel tank
explosion.
We are issuing this AD to require actions to correct the unsafe
condition on these products.
DATES: This AD becomes effective January 15, 2009.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of January 15,
2009.
ADDRESSES: You may examine the AD docket on the Internet at http://
www.regulations.gov or in person at the U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC.
FOR FURTHER INFORMATION CONTACT: Rocco Viselli, Aerospace Engineer,
Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New
York 11590; telephone (516) 228-7331; fax (516) 794-5531.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to include an AD that would apply to the specified products.
That NPRM was published in the Federal Register on September 23, 2008
(73 FR 54749). That NPRM proposed to correct an unsafe condition for
the specified products. The MCAI states:
Bombardier Aerospace has completed a system safety review of the
CL-600-2C10/CL-600-2D24 aircraft fuel system against new fuel tank
safety standards, introduced in Chapter 525 of the Airworthiness
Manual through Notice of Proposed Amendment (NPA) 2002-043. The
identified non-compliances were assessed using Transport Canada
Policy Letter No. 525-001 to determine if mandatory corrective
action was required.
The assessment showed that due to the close proximity of
intrinsically safe fuel system wiring with other wiring, a single
failure from wire chafing at various locations of the fuselage could
result in an ignition source inside the fuel tank. In addition,
chafing of the temperature sensor wiring against the high power
wiring in the avionics compartment could lead to overheating of the
temperature sensor and hot surface ignition. The presence of an
ignition source inside the fuel tank could result in a fuel tank
explosion.
To correct the unsafe condition, this directive mandates the
installation of conduit and the addition of spacers to protect fuel
tank wiring.
You may obtain further information by examining the MCAI in the AD
docket.
Comments
We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM or
[[Page 75313]]
on the determination of the cost to the public.
Conclusion
We reviewed the available data and determined that air safety and
the public interest require adopting the AD as proposed.
Differences Between This AD and the MCAI or Service Information
We have reviewed the MCAI and related service information and, in
general, agree with their substance. But we might have found it
necessary to use different words from those in the MCAI to ensure the
AD is clear for U.S. operators and is enforceable. In making these
changes, we do not intend to differ substantively from the information
provided in the MCAI and related service information.
We might also have required different actions in this AD from those
in the MCAI in order to follow our FAA policies. Any such differences
are highlighted in a Note within the AD.
Costs of Compliance
We estimate that this AD will affect about 159 products of U.S.
registry. We also estimate that it will take about 38 work-hours per
product to comply with the basic requirements of this AD. The average
labor rate is $80 per work-hour. Required parts will cost about $2,914
per product. Where the service information lists required parts costs
that are covered under warranty, we have assumed that there will be no
charge for these parts. As we do not control warranty coverage for
affected parties, some parties may incur costs higher than estimated
here. Based on these figures, we estimate the cost of this AD to the
U.S. operators to be $946,686, or $5,954 per product.
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 determined that this AD will not have federalism implications
under Executive Order 13132. This AD will 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 this AD:
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 AD and placed it in the AD docket.
Examining the AD Docket
You may examine the AD docket on the Internet at http://
www.regulations.gov; or in person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains the NPRM, the regulatory evaluation,
any comments received, and other information. The street address for
the Docket Operations office (telephone (800) 647-5527) is 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, Incorporation by
reference, Safety.
Adoption of the Amendment
0
Accordingly, under the authority delegated to me by the Administrator,
the FAA amends 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
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]
0
2. The FAA amends Sec. 39.13 by adding the following new AD:
2008-25-03 Bombardier, Inc. (Formerly Canadair): Amendment 39-15761.
Docket No. FAA-2008-1007; Directorate Identifier 2008-NM-135-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective January
15, 2009.
Affected ADs
(b) None.
Applicability
(c) This AD applies to the airplanes identified in paragraphs
(c)(1) and (c)(2) of this AD, certificated in any category.
(1) Bombardier Model CL-600-2C10 (Regional Jet Series 700, 701,
& 702) airplanes, serial numbers 10003 through 10169 inclusive.
(2) Bombardier Model CL-600-2D24 (Regional Jet Series 900)
airplanes, serial numbers 15001 through 15030 inclusive.
Subject
(d) Air Transport Association (ATA) of America Code 24:
Electrical Power.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
Bombardier Aerospace has completed a system safety review of the
CL-600-2C10/CL-600-2D24 aircraft fuel system against new fuel tank
safety standards, introduced in Chapter 525 of the Airworthiness
Manual through Notice of Proposed Amendment (NPA) 2002-043. The
identified non-compliances were assessed using Transport Canada
Policy Letter No. 525-001 to determine if mandatory corrective
action was required.
The assessment showed that due to the close proximity of
intrinsically safe fuel system wiring with other wiring, a single
failure from wire chafing at various locations of the fuselage could
result in an ignition source inside the fuel tank. In addition,
chafing of the temperature sensor wiring against the high power
wiring in the avionics compartment could lead to overheating of the
temperature sensor and hot surface ignition. The presence of an
ignition source inside the fuel tank could result in a fuel tank
explosion.
To correct the unsafe condition, this directive mandates the
installation of conduit and the addition of spacers to protect fuel
tank wiring.
Actions and Compliance
(f) Unless already done, do the following actions.
(1) Within 4,500 flight hours after the effective date of this
AD, modify the fuel system wiring along the fuselage and in the
avionics compartment by installing protective conduit and spacers,
in accordance with the Accomplishment Instructions of Bombardier
Service Bulletin 670BA-24-011, Revision C, dated November 28, 2005.
(2) Actions done before the effective date of this AD in
accordance with Bombardier Service Bulletin 670BA-24-011, dated
September 7, 2004; Revision A, dated December 14, 2004; or Revision
B, dated February 28, 2005; are acceptable for compliance with the
corresponding requirements of this AD.
[[Page 75314]]
FAA AD Differences
Note: This AD differs from the MCAI and/or service information
as follows: No differences.
Other FAA AD Provisions
(g) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York 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: Rocco Viselli, Aerospace
Engineer, Airframe and Propulsion Branch, ANE-171, FAA, New York
ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590;
telephone (516) 228-7331; fax (516) 794-5531. 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.
(2) Airworthy Product: For any requirement in this AD to obtain
corrective actions from a manufacturer or other source, use these
actions if they are FAA-approved. Corrective actions are considered
FAA-approved if they are approved by the State of Design Authority
(or their delegated agent). You are required to assure the product
is airworthy before it is returned to service.
(3) Reporting Requirements: For any reporting requirement in
this AD, under the provisions of the Paperwork Reduction Act, the
Office of Management and Budget (OMB) has approved the information
collection requirements and has assigned OMB Control Number 2120-
0056.
Related Information
(h) Refer to MCAI Canadian Airworthiness Directive CF-2008-25,
dated July 3, 2008; and Bombardier Service Bulletin 670BA-24-011,
Revision C, dated November 28, 2005; for related information.
Material Incorporated by Reference
(i) You must use Bombardier Service Bulletin 670BA-24-011,
Revision C, dated November 28, 2005, to do the actions required by
this AD, unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval,
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-
7401; e-mail thd.crj@aero.bombardier.com; Internet http://
www.bombardier.com.
(3) You may review copies of the service information that is
incorporated by reference at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton, Washington. For
information on the availability of this material at the FAA, call
425-227-1221 or 425-227-1152.
(4) You may also review copies of the service information at the
National Archives and Records Administration (NARA). For information
on the availability of this material at NARA, call 202-741-6030, or
go to: http://www.archives.gov/federal_register/code_of_federal_
regulations/ibr_locations.html.
Issued in Renton, Washington, on November 26, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E8-29077 Filed 12-10-08; 8:45 am]
BILLING CODE 4910-13-P