[Federal Register Volume 76, Number 137 (Monday, July 18, 2011)]
[Rules and Regulations]
[Pages 42029-42031]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2011-17698]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2011-0309; Directorate Identifier 2010-NM-255-AD;
Amendment 39-16755; AD 2011-15-08]
RIN 2120-AA64
Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and
F4-600R Series Airplanes, and Model A300 C4-605R Variant F Airplanes
(Collectively Called A300-600 Series Airplanes); and Model A310 Series
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:
A specific failure case of the THSA [trimmable horizontal
stabilizer actuator] upper primary attachment, which may result in a
loading of the upper secondary attachment, has been identified by
analysis.
Primary load path failure can be caused by bearing migration
from the upper attachment gimbal by failure or loss of a retention
bolt.
In case of failure of the THSA upper primary attachment, the
THSA upper secondary attachment would engage. Because the upper
attachment secondary load path can only withstand the loads for a
limited period of time, the condition where it would be engaged
could lead, if not detected, to the failure of the secondary load
path, which would likely result in loss of control of the aeroplane.
* * * * *
We are issuing this AD to require actions to correct the unsafe
condition on these products.
DATES: This AD becomes effective August 22, 2011.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of August 22,
2011.
[[Page 42030]]
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: Dan Rodina, Aerospace Engineer,
International Branch, ANM-116, Transport Airplane Directorate, FAA,
1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone (425)
227-2125; fax (425) 227-1149.
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 April 8, 2011 (76 FR
19724). That NPRM proposed to correct an unsafe condition for the
specified products. The MCAI states:
A specific failure case of the THSA [trimmable horizontal
stabilizer actuator] upper primary attachment, which may result in a
loading of the upper secondary attachment, has been identified by
analysis.
Primary load path failure can be caused by bearing migration
from the upper attachment gimbal by failure or loss of a retention
bolt.
In case of failure of the THSA upper primary attachment, the
THSA upper secondary attachment would engage. Because the upper
attachment secondary load path can only withstand the loads for a
limited period of time, the condition where it would be engaged
could lead, if not detected, to the failure of the secondary load
path, which would likely result in loss of control of the aeroplane.
For the reasons explained above, this [EASA] AD requires
installation of three secondary retention plates for the gimbal
bearings on the THSA upper primary attachment.
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 215 products of U.S. registry.
We also estimate that it will take about 4 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 $3,021 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 $722,615, or $3,361 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:
2011-15-08 Airbus: Amendment 39-16755. Docket No. FAA-2011-0309;
Directorate Identifier 2010-NM-255-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective August
22, 2011.
Affected ADs
(b) None.
Applicability
(c) This AD applies to all Airbus Model A300 B4-601, B4-603, B4-
620, and B4-622 airplanes, Model A300 B4-605R and B4-622R airplanes,
Model A300 F4-605R and F4-622R airplanes, and Model A300 C4-
[[Page 42031]]
605R Variant F airplanes; and Model A310-203, -204, -221, -222, -
304, -322, -324, and -325 airplanes; certificated in any category.
Subject
(d) Air Transport Association (ATA) of America Code 27: Flight
controls.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
A specific failure case of the THSA [trimmable horizontal
stabilizer actuator] upper primary attachment, which may result in a
loading of the upper secondary attachment, has been identified by
analysis.
Primary load path failure can be caused by bearing migration
from the upper attachment gimbal by failure or loss of a retention
bolt.
In case of failure of the THSA upper primary attachment, the
THSA upper secondary attachment would engage. Because the upper
attachment secondary load path can only withstand the loads for a
limited period of time, the condition where it would be engaged
could lead, if not detected, to the failure of the secondary load
path, which would likely result in loss of control 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.
Installation
(g) Within 30 months after the effective date of this AD,
install three retention plates on the THSA upper primary attachment,
in accordance with the Accomplishment Instructions of Airbus
Mandatory Service Bulletin A300-27-6066 (for Model A300-600
series airplanes) or Airbus Mandatory Service Bulletin A310-27-
2103 (for Model A310 series airplanes), both dated June 10, 2010.
FAA AD Differences
Note 1: This AD differs from the MCAI and/or service information
as follows: No differences.
Other FAA AD Provisions
(h) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager,
International Branch, ANM-116, Transport Airplane Directorate, 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 International Branch, send it to ATTN: Dan Rodina,
Aerospace Engineer, International Branch, ANM-116, Transport
Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, Washington
98057-3356; telephone (425) 227-2125; fax (425) 227-1149.
Information may be e-mailed to: [email protected].
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
(i) Refer to MCAI European Aviation Safety Agency (EASA)
Airworthiness Directive 2010-0224, dated November 4, 2010; and
Airbus Mandatory Service Bulletins A300-27-6066 and A310-27-2103,
both dated June 10, 2010.
Material Incorporated by Reference
(j) You must use Airbus Mandatory Service Bulletin A300-27-6066,
dated June 10, 2010; or Airbus Mandatory Service Bulletin A310-27-
2103, dated June 10, 2010; 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
Airbus SAS--EAW (Airworthiness Office), 1 Rond Point Maurice
Bellonte, 31707 Blagnac Cedex, France; telephone +33 5 61 93 36 96;
fax +33 5 61 93 44 51; e-mail [email protected];
Internet http://www.airbus.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 July 6, 2011.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2011-17698 Filed 7-15-11; 8:45 am]
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