[Federal Register Volume 76, Number 55 (Tuesday, March 22, 2011)]
[Rules and Regulations]
[Pages 15823-15825]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-5771]
[[Page 15823]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0703; Directorate Identifier 2010-NM-040-AD;
Amendment 39-16633; AD 2011-06-08]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19
(Regional Jet Series 100 & 440) Airplanes, CL-600-2C10 (Regional Jet
Series 700, 701, & 702) Airplanes, CL-600-2D15 (Regional Jet Series
705) Airplanes, and CL-600-2D24 (Regional Jet Series 900) 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:
There have been failures of the harness assembly (power feeder
wires) connecting the Air-Driven Generator (ADG) to the aeroplane
electrical system, in the area close to the ADG cannon plug. Several
electrical wires were found cut as a combined result of corrosion
and bending stress from the harness mounting to the ADG.
The ADG electrical wires are insulated with a silver-plating for
corrosion protection. It has been determined that the silver-plating
of wire strands in the area of tight bend is highly susceptible to
breakdown. The plating layer may crack as a result of mechanical
stress, and consequently lead to the onset of corrosion on all, or a
majority, of the wire strands.
In the event of a damaged harness assembly, the ADG may not be
able to provide emergency electrical power to the aeroplane. * * *
We are issuing this AD to require actions to correct the unsafe
condition on these products.
DATES: This AD becomes effective April 26, 2011.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of April 26,
2011.
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: Assata Dessaline, 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) 228-7301; 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, 2010 (75
FR 47249). That NPRM proposed to correct an unsafe condition for the
specified products. The MCAI states:
There have been failures of the harness assembly (power feeder
wires) connecting the Air-Driven Generator (ADG) to the aeroplane
electrical system, in the area close to the ADG cannon plug. Several
electrical wires were found cut as a combined result of corrosion
and bending stress from the harness mounting to the ADG.
The ADG electrical wires are insulated with a silver-plating for
corrosion protection. It has been determined that the silver-plating
of wire strands in the area of tight bend is highly susceptible to
breakdown. The plating layer may crack as a result of mechanical
stress, and consequently lead to the onset of corrosion on all, or a
majority, of the wire strands.
In the event of a damaged harness assembly, the ADG may not be
able to provide emergency electrical power to the aeroplane. This
directive is issued to correct the identified unsafe condition by
requiring [the modification of the ADG, which includes] the
replacement of the harness assembly with tin-plated electrical
wires, [the replacement of the backshell,] and the re-orientation of
the ADG cannon plug to reduce bending stress.
You may obtain further information by examining the MCAI in the AD
docket.
Updated Relevant Service Information
We have received Bombardier Service Bulletin 601R-24-128, Revision
C, dated May 14, 2010. In the NPRM we referred to Bombardier Service
Bulletin 601R-24-128, Revision A, dated November 27, 2009, as the
source of service information for doing the required actions on certain
models affected by this AD. Revision C of that service bulletin makes
certain editorial changes. We have revised paragraph (g)(1) of this AD
to specify Revision C of that service bulletin, and revised paragraph
(h) of this AD to give credit for having done Bombardier Service
Bulletin 601R-24-128, Revision A, dated November 27, 2009, and Revision
B, dated April 16, 2010, prior to the effective date of this AD.
Comments
We gave the public the opportunity to participate in developing
this AD. We considered the comment received.
Request To Shorten Compliance Time
Air Line Pilots Association, International (ALPA) requested that
the compliance time of 72 months be reduced to 36 months, because the
corrective action only requires 8 work-hours to complete and ALPA
believes that 72 months is too long to comply with the AD based on the
importance of this modification.
We do not agree with the request for a shorter compliance time. In
developing the compliance time, we determined that the compliance time
of 72 months or 6,000 flight hours, whichever occurs first, is
appropriate in consideration of the safety implications, the average
utilization rate of the affected fleet, the practical aspects of an
orderly inspection of the fleet during regular maintenance periods, and
the availability of required modification parts. In addition, our
compliance time corresponds with the 72-month compliance time of the
parallel AD issued by Transport Canada Civil Aviation (TCCA). We have
not changed the AD in this regard.
Change to Applicability in This Final Rule
We received notice from Bombardier, Inc. and TCCA that certain
airplanes identified in the NPRM have had the actions specified by this
AD already incorporated in production, and therefore are not affected
by the identified unsafe condition. Specifically, Model CL-600-2B19
(Regional Jet Series 100 & 440) airplanes, serial numbers 8108 through
8111 have had the actions incorporated. We have reduced the
applicability in paragraph (c)(1) of this AD accordingly.
Conclusion
We reviewed the available data, including the comment received, and
determined that air safety and the public interest require adopting the
AD with the changes described previously. We determined that these
changes will not increase the economic burden on any operator or
increase the scope of the AD.
[[Page 15824]]
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 920 products of U.S. registry.
We also estimate that it will take 8 work-hours per product to comply
with the basic requirements of this AD. The average labor rate is $85
per work-hour. Required parts will cost about $1,881 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
$2,356,120, or $2,561 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
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:
2011-06-08 Bombardier, Inc.: Amendment 39-16633. Docket No. FAA-
2010-0703; Directorate Identifier 2010-NM-040-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective April
26, 2011.
Affected ADs
(b) None.
Applicability
(c) This AD applies to the airplanes identified in paragraphs
(c)(1), (c)(2), and (c)(3) of this AD, certificated in any category.
(1) Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100
& 440) airplanes, serial numbers 7305 through 7990 inclusive, and
8000 through 8107 inclusive.
(2) Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700,
701, & 702) airplanes, serial numbers 10003 through 10302 inclusive.
(3) Bombardier, Inc. Model CL-600-2D15 (Regional Jet Series 705)
and CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers
15001 through 15259 inclusive.
Subject
(d) Air Transport Association (ATA) of America Code 24:
Electrical power.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
There have been failures of the harness assembly (power feeder
wires) connecting the Air-Driven Generator (ADG) to the aeroplane
electrical system, in the area close to the ADG cannon plug. Several
electrical wires were found cut as a combined result of corrosion
and bending stress from the harness mounting to the ADG.
The ADG electrical wires are insulated with a silver-plating for
corrosion protection. It has been determined that the silver-plating
of wire strands in the area of tight bend is highly susceptible to
breakdown. The plating layer may crack as a result of mechanical
stress, and consequently lead to the onset of corrosion on all, or a
majority, of the wire strands.
In the event of a damaged harness assembly, the ADG may not be
able to provide emergency electrical power to the aeroplane. * * *
Compliance
(f) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Actions
(g) Within 6,000 flight hours or 72 months after the effective
date of this AD, whichever occurs first, do the applicable actions
specified in paragraph (g)(1) or (g)(2) of this AD.
(1) For Model CL-600-2B19 (Regional Jet Series 100 & 440)
airplanes: Modify the air-driven generator (ADG) in accordance with
the Accomplishment Instructions of Bombardier Service Bulletin 601R-
24-128, Revision C, dated May 14, 2010.
(2) For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702),
CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet
Series 900) airplanes: Modify the ADG in accordance with the
Accomplishment Instructions of Bombardier Service Bulletin 670BA-24-
027, dated September 17, 2009.
[[Page 15825]]
Credit for Actions Accomplished in Accordance With Previous Service
Information
(h) Actions accomplished before the effective date of this AD in
accordance with the Bombardier service bulletins identified in Table
1 of this AD are considered acceptable for compliance with the
corresponding action specified in this AD.
Table 1--Credit Service Bulletins
----------------------------------------------------------------------------------------------------------------
Bombardier Service Bulletin-- Revision-- Dated--
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601R-24-128........................... Original........................... September 17, 2009.
601R-24-128........................... A.................................. November 27, 2009.
601R-24-128........................... B.................................. April 16, 2010.
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FAA AD Differences
Note 1: This AD differs from the MCAI and/or service information
as follows: The Canadian airworthiness directive includes Model CL-
600-2B19 airplanes having serial numbers 8108 through 8111 in the
applicability. This AD does not apply to those airplanes.
Other FAA AD Provisions
(i) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York Aircraft Certification Office (ACO), ANE-170, 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: Program
Manager, Continuing Operational Safety, FAA, New York ACO, 1600
Stewart Avenue, Suite 410, Westbury, New York, 11590; telephone 516-
228-7300; fax 516-794-5531. Before using any approved AMOC, notify
your appropriate principal inspector, or lacking a principal
inspector, the manager of the local flight standards district
office/certificate holding 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.
Related Information
(j) Refer to MCAI Canadian Airworthiness Directive CF-2009-47,
dated December 14, 2009; Bombardier Service Bulletin 601R-24-128,
Revision C, dated May 14, 2010; and Bombardier Service Bulletin
670BA-24-027, dated September 17, 2009; for related information.
Material Incorporated by Reference
(k) You must use Bombardier Service Bulletin 601R-24-128,
Revision C, dated May 14, 2010; or Bombardier Service Bulletin
670BA-24-027, dated September 17, 2009; 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.
(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 March 4, 2011.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2011-5771 Filed 3-21-11; 8:45 am]
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