[Federal Register Volume 76, Number 147 (Monday, August 1, 2011)]
[Proposed Rules]
[Pages 45713-45715]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-19330]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2011-0720; Directorate Identifier 2010-NM-252-AD]
RIN 2120-AA64
Airworthiness Directives; Bombardier Inc. Model DHC-8-400 Series
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:
There has been one reported incident where the main landing gear
(MLG) failed to extend during testing of the MLG alternate release
system. Investigation revealed that the door release lever bushing
was worn, causing an increase in the lateral movement of the release
cable system. An increase in free-play within the release cable
system would cause additional wear to the door release lever bushing
and may lead to the turnbuckle fouling against the nacelle frame.
The bushing wear at the door release lever and turnbuckle fouling
could cause a failure in the alternate release system, preventing
the landing gear from extending in the case of a failure of the
normal MLG extension/retraction system.
* * * * *
The unsafe condition is loss of control during landing. 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 September 15,
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
[[Page 45714]]
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., Q-Series Technical Help Desk, 123 Garratt Boulevard,
Toronto, Ontario M3K 1Y5, Canada; telephone 416-375-4000; fax 416-375-
4539; 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, 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-2011-0720;
Directorate Identifier 2010-NM-252-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 (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2010-26, dated August 17, 2010 (referred to after this as ``the
MCAI''), to correct an unsafe condition for the specified products. The
MCAI states:
There has been one reported incident where the main landing gear
(MLG) failed to extend during testing of the MLG alternate release
system. Investigation revealed that the door release lever bushing
was worn, causing an increase in the lateral movement of the release
cable system. An increase in free-play within the release cable
system would cause additional wear to the door release lever bushing
and may lead to the turnbuckle fouling against the nacelle frame.
The bushing wear at the door release lever and turnbuckle fouling
could cause a failure in the alternate release system, preventing
the landing gear from extending in the case of a failure of the
normal MLG extension/retraction system.
This directive is to mandate the incorporation of a new
maintenance task to prevent excessive free-play of the turnbuckle
and cable within the alternate release system.
The unsafe condition is loss of control during landing. You may obtain
further information by examining the MCAI in the AD docket.
Relevant Service Information
Bombardier has issued Temporary Revision (TR) MRB-46, dated
February 4, 2010, to Section 1-32, Systems/Powerplant Maintenance
Program, of the Maintenance Review Board (MRB) Report Part 1, of the
Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7. 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 65 products of U.S. registry. We also estimate that
it would take about 1 work-hour per product to comply with the basic
requirements of this proposed AD. The average labor rate is $85 per
work-hour. Based on these figures, we estimate the cost of the proposed
AD on U.S. operators to be $5,525, or $85 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 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;
[[Page 45715]]
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-2011-0720; Directorate Identifier
2010-NM-252-AD.
Comments Due Date
(a) We must receive comments by September 15, 2011.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier Inc. Model DHC-8-400, -401,
and -402 airplanes, certificated in any category, having serial
numbers 4001 and subsequent.
Subject
(d) Air Transport Association (ATA) of America Code 32: Landing
Gear.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
There has been one reported incident where the main landing gear
(MLG) failed to extend during testing of the MLG alternate release
system. Investigation revealed that the door release lever bushing
was worn, causing an increase in the lateral movement of the release
cable system. An increase in free-play within the release cable
system would cause additional wear to the door release lever bushing
and may lead to the turnbuckle fouling against the nacelle frame.
The bushing wear at the door release lever and turnbuckle fouling
could cause a failure in the alternate release system, preventing
the landing gear from extending in the case of a failure of the
normal MLG extension/retraction system.
* * * * *
The unsafe condition is loss of control during landing.
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 30 days after the effective date of this AD, revise
the maintenance program by incorporating Task 323400-203 specified
in Bombardier Temporary Revision (TR) MRB-46, dated February 4,
2010, to Section 1-32, Systems/Powerplant Maintenance Program, of
the Maintenance Review Board (MRB) Report Part 1, of the Bombardier
Q400 Dash 8 Maintenance Requirements Manual, PSM 1-84-7. The initial
compliance time for the actions specified in Bombardier TR MRB-46,
dated February 4, 2010, is within 6,000 flight hours after the
effective date of this AD. Thereafter, operate the airplane
according to the procedures and compliance times in Bombardier TR
MRB-46, dated February 4, 2010.
No Alternative Actions, Intervals, and/or Critical Design Configuration
Control Limitations (CDCCLs)
(h) After accomplishing the revision required by paragraph (g)
of this AD, no alternative actions (e.g., inspections), intervals,
and/or CDCCLs may be used unless the actions, intervals, and/or
CDCCLs are approved as an alternative method of compliance (AMOC) in
accordance with the procedures specified in paragraph (i) of this
AD.
FAA AD Differences
Note 1: This AD differs from the MCAI and/or service information
as follows: No differences.
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. In accordance with 14 CFR 39.19,
send your request to your principal inspector or local Flight
Standards District Office, as appropriate. If sending information
directly to the New York ACO, Send it to ATTN: Program Manager,
Continuing Operational Safety, 1600 Stewart Avenue, Suite 410,
Westbury, NY 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-2010-26,
dated August 17, 2010; and Bombardier Temporary Revision MRB-46,
dated February 4, 2010, to Section 1-32, Systems/Powerplant
Maintenance Program, of the Maintenance Review Board Report Part 1,
of the Bombardier Q400 Dash 8 Maintenance Requirements Manual, PSM
1-84-7; for related information.
Issued in Renton, Washington, on July 22, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2011-19330 Filed 7-29-11; 8:45 am]
BILLING CODE 4910-13-P