AD 2008-22-20

[Federal Register Volume 73, Number 219 (Wednesday, November 12, 2008)]
[Rules and Regulations]
[Pages 66747-66750]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: E8-25787]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0667; Directorate Identifier 2008-NM-009-AD; 
Amendment 39-15717; AD 2008-22-20]
RIN 2120-AA64


Airworthiness Directives; Airbus Model A330-200, A330-300, and 
A340-300 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:

    During fatigue tests (EF3) on the A340-600, damages were found 
in longitudinal doubler at VTP [vertical tail plane] attachment 
cutout between Frame (FR) 80 and FR86. This damage occurred between 
58341 and 72891 simulated Flight Cycles (FC).
    Due to the higher Design Service Goal and different design 
(e.g., doubler thickness) [of the] A330-200/-300 and A340-300 
aircraft series, the damage assessment concluded [there was] 
potential impact on [the airplanes specified in the] applicability.
* * * * *
The unsafe condition is crack propagation in the VTP attachment cutout, 
which could reduce airplane structural integrity in the tail section. 
We are issuing this AD to require actions to correct the unsafe 
condition on these products.

DATES: This AD becomes effective December 17, 2008.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of December 17, 
2008.

ADDRESSES: You may examine the AD docket on the Internet at <a href="http://www.regulations.gov">http://www.regulations.gov</a> 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: Vladimir Ulyanov, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 
227-1138; 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 June 24, 2008 (73 FR 
35603). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    During fatigue tests (EF3) on the A340-600, damages were found 
in longitudinal doubler at VTP [vertical tail plane] attachment 
cutout between Frame (FR) 80 and FR86. This damage occurred between 
58341 and 72891 simulated Flight Cycles (FC).
    Due to the higher Design Service Goal and different design 
(e.g., doubler thickness) [of the] A330-200/-300 and A340-300 
aircraft series, the damage assessment concluded [there was] 
potential impact on [the airplanes specified in the] applicability.
    [T]o allow early detection of cracks, which could [prevent] 
possible crack propagation and consequently to maintain the 
structural integrity of the upper shell structure between FR80 and 
FR86, this Airworthiness Directive (AD) mandates an inspection 
program [for cracking] of this area using a high frequency eddy 
current (HFEC) method, and a modification to improve the upper shell 
structure.

The unsafe condition is crack propagation in the VTP attachment cutout, 
which could reduce airplane structural integrity in the tail section. 
Corrective actions include doing eddy current inspections for cracking 
of certain fastener rows, and contacting Airbus for repair instructions 
and repairing. 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 considered the comment received.

[[Page 66748]]

Request To Allow Flight With Cracks

    Northwest Airlines (NWA) requests that we reconsider eliminating 
the provision for flight with certain cracks. NWA states that the MCAI 
and Airbus service bulletins (that were referenced in the NPRM as 
appropriate sources of service information) provide for flight with 
certain cracks if follow-on inspections are accomplished in accordance 
with the service bulletin.
    We do not concur. Our policy specifies the requirement to repair 
known cracks before further flight (though we may make exceptions to 
this policy in certain cases of unusual need, as discussed below). This 
policy is based on the fact that such damaged airplanes do not conform 
to the FAA-certificated type design and, therefore, are not airworthy 
until a properly approved repair is made. While recognizing that repair 
deferrals might be necessary at times, our policy is intended to 
minimize adverse human factors relating to the lack of reliability of 
long-term repetitive inspections, which might reduce the safety of the 
type-certificated design if such repair deferrals are practiced 
routinely.
    As noted above, we may make an exception to this policy in certain 
cases, if there is an unusual need for a temporary deferral. Unusual 
needs include such circumstances as legitimate difficulty in acquiring 
parts to accomplish repairs. Under such conditions, we may allow a 
temporary deferral of the repair, subject to a stringent inspection 
program acceptable to the FAA. We acknowledge that the manufacturer has 
specified inspection intervals that are intended to allow continued 
operation with known cracks, and to prevent the need for extensive 
repairs. However, since we are not aware of any unusual need for repair 
deferral in regard to this AD, we have not evaluated these inspection 
intervals.
    Under the provisions of paragraph (g)(1) of this AD, we will 
consider requests for approval of an AMOC if sufficient data are 
submitted to substantiate that temporary deferral of repair with 
follow-on inspections would provide an acceptable level of safety. We 
have not changed the AD in this regard.

Actions Since NPRM Was Issued

    Airbus has issued revisions to two service bulletins referenced in 
the NPRM as appropriate sources of service information. Airbus 
Mandatory Service Bulletins A330-53-3168 and A340-53-4174, both 
Revision 01, both dated February 15, 2008, are essentially the same as 
the original versions of those service bulletins except for 
clarifications, and no additional work is required for airplanes 
modified per the original issue. We have changed the references in 
paragraphs (f)(1), (f)(2)(i), and (h) of this AD to include Revision 01 
of those service bulletins, and added paragraph (f)(4) to this AD to 
give credit for actions performed according to the original issues.

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.

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 26 products of U.S. 
registry. We also estimate that it will take about 202 work-hours per 
product to comply with the basic requirements of this AD. The average 
labor rate is $80 per work-hour. Required parts will cost about $19,020 
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 $914,680, or $35,180 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 <a href="http://www.regulations.gov">http://www.regulations.gov</a>; 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

0
Accordingly, under the authority delegated to me by the Administrator, 
the FAA amends 14 CFR part 39 as follows:

[[Page 66749]]

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:

2008-22-20 Airbus: Amendment 39-15717. Docket No. FAA-2008-0667; 
Directorate Identifier 2008-NM-009-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective December 
17, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Airbus Model A330-200, A330-300, and 
A340-300 series airplanes; certificated in any category; all 
certified models, all serial numbers; on which Airbus Modification 
44205 has been embodied in production, except those on which Airbus 
Modification 52974 or 53223 has been embodied in production.

Subject

    (d) Air Transport Association (ATA) of America Code 53: 
Fuselage.

Reason

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

    During fatigue tests (EF3) on the A340-600, damages were found 
in longitudinal doubler at VTP [vertical tail plane] attachment 
cutout between Frame (FR) 80 and FR86. This damage occurred between 
58341 and 72891 simulated Flight Cycles (FC).
    Due to the higher Design Service Goal and different design 
(e.g., doubler thickness) [of the] A330-200/-300 and A340-300 
aircraft series, the damage assessment concluded [there was] 
potential impact on [the airplanes specified in the] applicability.
    [T]o allow early detection of cracks, which could [prevent] 
possible crack propagation and consequently to maintain the 
structural integrity of the upper shell structure between FR80 and 
FR86, this Airworthiness Directive (AD) mandates an inspection 
program [for cracking] of this area using a high frequency eddy 
current (HFEC) method, and a modification to improve the upper shell 
structure.

The unsafe condition is crack propagation in the VTP attachment 
cutout, which could reduce airplane structural integrity in the tail 
section. Corrective actions include doing eddy current inspections 
for cracking of certain fastener rows, and contacting Airbus for 
repair instructions and repairing.

Actions and Compliance

    (f) Unless already done, do the following actions.
    (1) For Airbus Model A330-300 and A340-300 series airplanes, 
except Model A340-300 weight variant (WV) 027 airplanes: At the 
applicable compliance time specified in paragraph (f)(2) of this AD, 
perform a HFEC inspection of the upper shell structure between FR80 
and FR86, in accordance with the Accomplishment Instructions of 
Airbus Mandatory Service Bulletin A330-53-3168 or A340-53-4174, both 
Revision 01, both dated February 15, 2008, as applicable.
    (i) If no crack is detected, repeat the inspection thereafter 
within the intervals specified in paragraph 1.E.(2) of Airbus 
Mandatory Service Bulletin A330-53-3168 or A340-53-4174, both 
Revision 01, both dated February 15, 2008, as applicable.
    (ii) If any crack is detected during any inspection required by 
this AD: Before next flight, contact Airbus for repair instructions 
and do applicable repairs.
    (iii) Doing the modification of the upper shell structure in 
accordance with Airbus Service Bulletin A330-53-3159 or A340-53-
4165, both dated September 19, 2007, as applicable, ends the 
inspections required by paragraph (f)(1) of this AD.
    (2) Do the actions required by paragraph (f)(1) of this AD at 
the later of the compliance times specified in paragraph (f)(2)(i) 
and (f)(2)(ii) of this AD.
    (i) Within the compliance times specified in paragraph 1.E.(2) 
of Airbus Mandatory Service Bulletin A330-53-3168 or A340-53-4174, 
both Revision 01, both dated February 15, 2008, as applicable.
    (ii) Within 3 months after the effective date of this AD.
    (3) At the applicable time specified in paragraphs (f)(3)(i), 
(f)(3)(ii), and (f)(3)(iii) of this AD or within 3 months after the 
effective date of this AD, whichever occurs later, modify the upper 
shell structure between FR80 and FR86 (including doing eddy current 
inspections for cracking of certain fastener rows and applicable 
corrective actions) in accordance with the Accomplishment 
Instructions of Airbus Mandatory Service Bulletin A330-53-3160, 
dated July 9, 2007; or Airbus Mandatory Service Bulletin A340-53-
4172, dated July 10, 2007; as applicable. Do all applicable 
corrective actions before further flight.
    (i) For Model A330-200 airplanes, WV 020 through WV 027: Prior 
to the accumulation of 13,500 total flight cycles.
    (ii) For Model A330-200 airplanes, WV 050 through WV 055: Prior 
to the accumulation of 10,700 total flight cycles or 59,300 total 
flight hours, whichever occurs first.
    (iii) For Model A340-300 airplanes, WV 027: Prior to the 
accumulation of 14,200 total flight cycles.
    (4) Inspections accomplished before the effective date of this 
AD according to Airbus Mandatory Service Bulletins A330-53-3168 and 
A340-53-4174, both dated September 19, 2007, as applicable, are 
considered acceptable for compliance with the corresponding actions 
specified in this AD.

FAA AD Differences

    Note: This AD differs from the MCAI and/or service information 
as follows: Although the MCAI allows further flight after cracks are 
found during compliance with the required action, this AD requires 
that you repair the crack(s) before further flight.

Other FAA AD Provisions

    (g) 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. Send information to ATTN: 
Vladimir Ulyanov, Aerospace Engineer, International Branch, ANM-116, 
Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, 
Washington 98057-3356; telephone (425) 227-1138; fax (425) 227-1149. 
Before using any approved AMOC on any airplane to which the AMOC 
applies, notify your appropriate principal inspector (PI) in the FAA 
Flight Standards District Office (FSDO), or lacking a PI, your local 
FSDO.
    (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 European Aviation Safety Agency Airworthiness 
Directive 2007-0284, dated November 12, 2007, and the service 
bulletins specified in Table 1 of this AD, for related information.

                                          Table 1--Service Information
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      Airbus service information                      Revision                               Date
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Mandatory Service Bulletin A330-53-     Original...........................  July 9, 2007.
 3160.
Mandatory Service Bulletin A330-53-     01.................................  February 15, 2008.
 3168.
Mandatory Service Bulletin A340-53-     Original...........................  July 10, 2007.
 4172.
Mandatory Service Bulletin A340-53-     01.................................  February 15, 2008.
 4174.
Service Bulletin A330-53-3159.........  Original...........................  September 19, 2007.

[[Page 66750]]

 
Service Bulletin A340-53-4165.........  Original...........................  September 19, 2007.
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Material Incorporated by Reference

    (i) You must use the service information specified in Table 2 of 
this AD 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, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France; 
telephone +33 5 61 93 33 33; Internet <a href="http://www.airbus.com">http://www.airbus.com</a>.
    (3) You may review copies at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington; or 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: <a href="http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html">http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html</a>.

                                   Table 2--Material Incorporated by Reference
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      Airbus service information                      Revision                               Date
----------------------------------------------------------------------------------------------------------------
Mandatory Service Bulletin A330-53-     Original...........................  July 9, 2007.
 3160.
Mandatory Service Bulletin A330-53-     01.................................  February 15, 2008.
 3168.
Mandatory Service Bulletin A340-53-     Original...........................  July 10, 2007.
 4172.
Mandatory Service Bulletin A340-53-     01.................................  February 15, 2008.
 4174.
Service Bulletin A330-53-3159.........  Original...........................  September 19, 2007.
Service Bulletin A340-53-4165.........  Original...........................  September 19, 2007.
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    Issued in Renton, Washington, on October 20, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E8-25787 Filed 11-10-08; 8:45 am]
BILLING CODE 4910-13-P