Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A) Airplanes

[Federal Register Volume 74, Number 215 (Monday, November 9, 2009)]
[Rules and Regulations]
[Pages 57577-57578]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E9-26593]



[[Page 57577]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0689; Directorate Identifier 2009-NM-092-AD; 
Amendment 39-16081; AD 2009-23-09]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), 
CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A) Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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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:

    Two cases have been reported in which the ADG [air driven 
generator] has failed to power the essential bus following in-flight 
deployment as part of its periodic operational check. Subsequent 
inspection revealed that the ADG power feeder harness wire (* * * 
[aromatic polyimide]) had chafed on the backshell of its own 
connector (P1XC), resulting in a short circuit, wire damage and 
disconnection of the wire from the ADG. Coupled with a dual 
generator failure, such a disconnection would result in the loss of 
emergency power to critical systems, with a consequent adverse 
effect on the controllability of the aircraft.
* * * * *
We are issuing this AD to require actions to correct the unsafe 
condition on these products.

DATES: This AD becomes effective December 14, 2009.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of December 14, 
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: Wing Chan, Aerospace Engineer, 
Avionics and Flight Test Branch, ANE-172, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7311; 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 August 5, 2009 (74 
FR 38999). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    Two cases have been reported in which the ADG [air driven 
generator] has failed to power the essential bus following in-flight 
deployment as part of its periodic operational check. Subsequent 
inspection revealed that the ADG power feeder harness wire (* * * 
[aromatic polyimide]) had chafed on the backshell of its own 
connector (P1XC), resulting in a short circuit, wire damage and 
disconnection of the wire from the ADG. Coupled with a dual 
generator failure, such a disconnection would result in the loss of 
emergency power to critical systems, with a consequent adverse 
effect on the controllability of the aircraft.
    This directive mandates an inspection to determine the type of 
wire in the installed ADG power feeder harness. If the wires are a * 
* * [aromatic polyimide] type, the ADG power feeder harness is to be 
replaced with one incorporating * * * [non-aromatic polyimide] type 
wire.

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 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 203 products of U.S. 
registry. We also estimate that it will take about 2 work-hours per 
product to comply with the basic requirements of this AD. The average 
labor rate is $80 per work-hour. Based on these figures, we estimate 
the cost of this AD to the U.S. operators to be $32,480, or $160 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

[[Page 57578]]

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:

2009-23-09 Bombardier, Inc. (Formerly Canadair): Amendment 39-16081. 
Docket No. FAA-2009-0689; Directorate Identifier 2009-NM-092-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective December 
14, 2009.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to the airplanes, certificated in any 
category, as identified in paragraphs (c)(1), (c)(2), and (c)(3) of 
this AD.
    (1) Bombardier Model CL-600-1A11 (CL-600) airplanes, serial 
numbers 1004 through 1085 inclusive.
    (2) Bombardier Model CL-600-2A12 (CL-601) airplanes, serial 
numbers 3001 through 3066 inclusive.
    (3) Bombardier Model CL-600-2B16 (CL-601-3A) airplanes, serial 
numbers 5001 through 5131 inclusive.

Subject

    (d) Air Transport Association (ATA) of America Code 24: 
Electrical power.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    Two cases have been reported in which the ADG [air driven 
generator] has failed to power the essential bus following in-flight 
deployment as part of its periodic operational check. Subsequent 
inspection revealed that the ADG power feeder harness wire (* * * 
[aromatic polyimide]) had chafed on the backshell of its own 
connector (P1XC), resulting in a short circuit, wire damage and 
disconnection of the wire from the ADG. Coupled with a dual 
generator failure, such a disconnection would result in the loss of 
emergency power to critical systems, with a consequent adverse 
effect on the controllability of the aircraft.
    This directive mandates an inspection to determine the type of 
wire in the installed ADG power feeder harness. If the wires are a * 
* * [aromatic polyimide] type, the ADG power feeder harness is to be 
replaced with one incorporating * * * [non-aromatic polyimide] type 
wire.

Actions and Compliance

    (f) Unless already done, within 26 months after the effective 
date of this AD, inspect the ADG power feeder harness to determine 
the wire type, in accordance with the Accomplishment Instructions of 
Bombardier Service Bulletin 600-0737 or 601-0591, both dated July 
23, 2007, as applicable. A review of airplane maintenance records is 
acceptable in lieu of this inspection if the wire type of the power 
feeder harness can be conclusively determined from that review. If 
the wire type is determined to be aromatic polyimide, replace the 
ADG power feeder harness, before further flight, in accordance with 
Part B of the Accomplishment Instructions of Bombardier Service 
Bulletin 600-0737 or 601-0591, both dated July 23, 2007, as 
applicable.

FAA AD Differences

    Note 1: 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: Wing Chan, Aerospace 
Engineer, Avionics and Flight Test Branch, ANE-172, FAA, New York 
ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; 
telephone (516) 228-7311; fax (516) 794-5531. Before using any 
approved AMOC on any airplane to which the AMOC applies, notify your 
principal maintenance inspector (PMI) or principal avionics 
inspector (PAI), as appropriate, or lacking a principal inspector, 
your local Flight Standards District Office. The AMOC approval 
letter must specifically reference this AD.
    (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-2009-18, 
dated April 27, 2009; and Bombardier Service Bulletins 600-0737 and 
601-0591, both dated July 23, 2007; for related information.

Material Incorporated by Reference

    (i) You must use Bombardier Service Bulletin 600-0737, dated 
July 23, 2007; or Bombardier Service Bulletin 601-0591, dated July 
23, 2007; as applicable; 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 [email protected]; Internet http://www.bombardier.com.
    (3) You may review copies of the service information 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 that 
is incorporated by reference 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 Ocotober 26, 2009.
Stephen P. Boyd,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E9-26593 Filed 11-6-09; 8:45 am]
BILLING CODE 4910-13-P

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