[Federal Register Volume 76, Number 49 (Monday, March 14, 2011)]
[Proposed Rules]
[Pages 13536-13539]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-5722]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2011-0159; Directorate Identifier 2010-NM-246-AD]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc. Model CL-600-2C10
(Regional Jet Series 700, 701, & 702), Model CL-600-2D15 (Regional Jet
Series 705), and Model CL-600-2D24 (Regional Jet Series 900) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to adopt a new airworthiness directive (AD) for the
products listed above. This proposed 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:
An inspection by the vendor revealed that a number of Rubber
Bull Gears (RBG) in the
[[Page 13537]]
Horizontal Stabilizer Trim Actuator (HSTA) of the CL-600-2C10, CL-
600-2D15 and CL-600-2D24 aeroplanes were installed with a wheel
material hardness out of specification. This non-conformity has a
direct impact on the HSTA life limit. The teeth of these non-
conformant RBGs could break and in extreme cases, could lead to
uncontrolled HSTA movement without the ability to re-trim the
aeroplane. If not corrected, this condition could result in a
difficulty to control the pitch and subsequent loss of the
aeroplane.
* * * * *
The proposed AD would require actions that are intended to address
the unsafe condition described in the MCAI.
DATES: We must receive comments on this proposed AD by April 28, 2011.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
Fax: (202) 493-2251.
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 W12-40, 1200 New
Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
For service information identified in this proposed 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. You
may review copies of the referenced 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.
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 this proposed AD, 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.
FOR FURTHER INFORMATION CONTACT: Fabio Buttitta, Aerospace Engineer,
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft
Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury,
New York 11590; telephone (516) 228-7303; fax (516) 794-5531.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2011-0159;
Directorate Identifier 2010-NM-246-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD based on 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 about this proposed AD.
Discussion
Transport Canada Civil Aviation which is the aviation authority for
Canada, has issued Canadian Airworthiness Directive CF-2010-34, dated
October 5, 2010 (referred to after this as ``the MCAI''), to correct an
unsafe condition for the specified products. The MCAI states:
An inspection by the vendor revealed that a number of Rubber
Bull Gears (RBG) in the Horizontal Stabilizer Trim Actuator (HSTA)
of the CL-600-2C10, CL-600-2D15 and CL-600-2D24 aeroplanes were
installed with a wheel material hardness out of specification. This
non-conformity has a direct impact on the HSTA life limit. The teeth
of these non-conformant RBGs could break and in extreme cases, could
lead to uncontrolled HSTA movement without the ability to re-trim
the aeroplane. If not corrected, this condition could result in a
difficulty to control the pitch and subsequent loss of the
aeroplane.
This [Canadian airworthiness] directive mandates replacement of
the RBGs which have material hardness out of specification [with a
modified HSTA].
You may obtain further information by examining the MCAI in the AD
docket.
Relevant Service Information
Bombardier has issued Service Bulletin 670BA-27-058, dated August
31, 2010; and SAGEM has issued SAGEM Service Bulletin 8489-27-007,
Revision 1, dated August 10, 2010. The actions described in this
service information are intended to correct the unsafe condition
identified in the MCAI.
FAA's Determination and Requirements of This Proposed AD
This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
evaluated all pertinent information and determined an unsafe condition
exists and is likely to exist or develop on other products of the same
type design.
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 proposed different actions in this AD from those
in the MCAI in order to follow FAA policies. Any such differences are
highlighted in a Note within the proposed AD.
Costs of Compliance
Based on the service information, we estimate that this proposed AD
would affect about 387 products of U.S. registry. We also estimate that
it would take about 9 work-hours per product to comply with the basic
requirements of this proposed AD. The average labor rate is $85 per
work-hour. Required parts would cost about $0 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 costs.
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 the proposed AD on U.S. operators to
be $296,055, or $765 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
[[Page 13538]]
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 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 this 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, 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:
Bombardier, Inc.: Docket No. FAA-2011-0159; Directorate Identifier
2010-NM-246-AD.
Comments Due Date
(a) We must receive comments by April 28, 2011.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier, Inc. Model CL-600-2C10
(Regional Jet Series 700, 701, & 702), Model CL-600-2D15 (Regional
Jet Series 705), and Model CL-600-2D24 (Regional Jet Series 900)
airplanes, certificated in any category, equipped with a horizontal
stabilizer trim actuator having part numbers (P/Ns) 8489-5, 8489-6,
8489-7, and 8489-7R.
Subject
(d) Air Transport Association (ATA) of America Code 27: Flight
controls.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
An inspection by the vendor revealed that a number of Rubber
Bull Gears (RBG) in the Horizontal Stabilizer Trim Actuator (HSTA)
of the CL-600-2C10, CL-600-2D15 and CL-600-2D24 aeroplanes were
installed with a wheel material hardness out of specification. This
non-conformity has a direct impact on the HSTA life limit. The teeth
of these non-conformant RBGs could break and in extreme cases, could
lead to uncontrolled HSTA movement without the ability to re-trim
the aeroplane. If not corrected, this condition could result in a
difficulty to control the pitch and subsequent loss of 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.
Modifying the HSTA
(g) For airplanes having any HSTA with S[sol]N 107, 111, 124,
126, 135, 139, 142, 145, 146, 266, 268, 271, 274, 276, 277, 280, 282
through 285 inclusive, 290, 292, 294, 297, 299, 307, 309, 320, 337,
400, 402, 403, 410, 412, 418, 421 through 428 inclusive, 430, 435
through 439 inclusive, 441, 443 through 446 inclusive, 448 through
450 inclusive, 452 through 454 inclusive, 456, 459, 461, 463 through
470 inclusive, 472, 474 through 476 inclusive, 478, 545 through 549
inclusive, 570, 571, 573, 574, 600, 603, 608, 612 through 616
inclusive, 623, 627, and 629 through 659 inclusive: At the
applicable compliance time specified in paragraph (g)(1) or (g)(2)
of this AD, replace the HSTA with a modified HSTA, in accordance
with the Accomplishment Instructions of Bombardier Service Bulletin
670BA-27-058, dated August 31, 2010.
(1) For HSTAs that have accumulated 8,700 total flight cycles or
less as of the effective date of this AD: Within 3,000 flight cycles
from the effective date of this AD, or before the HSTA has
accumulated 10,500 flight cycles, whichever occurs first.
(2) For HSTAs that have accumulated more than 8,700 total flight
cycles as of the effective date of this AD: Within 1,800 flight
cycles after the effective date of this AD.
(h) For airplanes having any HSTA with S[sol]N 185, 479, 481,
482, 485, 487, 489, 491 through 496 inclusive, 498, 499, 501, 503,
504, 506, 507, 509, 512 through 514 inclusive, 517, 519 through 522
inclusive, 524, 526 through 528 inclusive, 530, 534 through 536
inclusive, 539, 542, and 543: Within 1,800 flight cycles after the
effective date of this AD, replace the affected HSTA with a modified
HSTA in accordance with the Accomplishment Instructions of
Bombardier Service Bulletin 670BA-27-058, dated August 31, 2010.
Parts Installation
(i) As of the effective date of this AD, no person may install a
HSTA, having P/N 8489-5, 8489-6, 8489-7, or 8489-7R, with any serial
numbers identified in paragraph (g) or (h) of this AD, on any
airplane, unless that HSTA has been modified in accordance with
SAGEM Service Bulletin 8489-27-007, Revision 1, dated August 10,
2010, and that HSTA has a suffix ``B'' beside the serial number.
FAA AD Differences
Note 1: This AD differs from the MCAI and/or service information
as follows: No differences.
Other FAA AD Provisions
(j) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York Aircraft Certification Office, ANE-170, FAA, has the authority
to approve AMOCs for this AD, if requested using the procedures
found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your
request to your principal inspector or local Flight Standards
District Office, as appropriate. 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
(k) Refer to MCAI Canadian Airworthiness Directive CF-2010-34,
dated October 5, 2010; Bombardier Service Bulletin 670BA-27-058,
dated August 31, 2010; and SAGEM Service Bulletin 8489-27-007,
Revision 1, dated August 10, 2010, for related information.
[[Page 13539]]
Issued in Renton, Washington, on March 4, 2011.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2011-5722 Filed 3-11-11; 8:45 am]
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