AD 2007-03-10

The FAA is adopting a new airworthiness directive (AD) for all Airbus airplanes identified above. This AD requires improving the routing of certain electrical wire bundles in certain airplane zones, as applicable to the airplane model. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

Final rule.

2007-03-10 Airbus: Amendment 39-14921. Docket No. FAA-2006-24289; Directorate Identifier 2005-NM-186-AD.

Effective Date

(a) This AD becomes effective March 12, 2007.

Affected ADs

(b) None.

Applicability

(c) This AD applies to all Airbus Model A300 airplanes; A300 B4- 601, B4-603, B4-620, B4-622, B4-605R, B4-622R, A300 F4-605R, F4- 622R, and C4-605R Variant F airplanes; and A310 airplanes; certificated in any category.

Unsafe Condition

(d) This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

Compliance

(e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.

Action 3--Modify the Retaining and Protection System(f) For all airplanes identified in paragraphs (f)(1) and (f)(2) of this AD: Within 26 months after the effective date of this AD, modify the retaining and protection system for the electrical bundles located at the wing-to-fuselage junction, under the flap control screw jack.

(1) For Model A300 airplanes: Do the actions specified in paragraph (f) of this AD in accordance with the Accomplishment Instructions of Airbus Service Bulletin A300-24-0085, Revision 06, dated October 13, 2005.

(2) For Model A300 B4-601, B4-603, B4-620, B4-622, B4-605R, B4- 622R, A300 F4-605R, F4-622R, and C4-605R Variant F airplanes, except those on which Airbus Modification 10505 has been done: Do the actions specified in paragraph (f) of this AD in accordance with the Accomplishment Instructions of Airbus Service Bulletin A300-24-6043, Revision 07, dated October 11, 2006.

Action 4--Modify the Electrical Wiring of Routes 1P and 2P

(g) For Model A300 B4-601, B4-603, B4-620, B4-622, B4-605R, B4- 622R, A300 F4-605R, F4-622R, and C4-605R Variant F airplanes; except those on which Airbus Modification 11741 has been done: Within 26 months after the effective date of this AD, modify the electrical wiring of routes 1P and 2P (along the top panel of the shroud box and the rear spars of the wings) by extending the protective conduits up to the next support, and replace the two existing clamps on this support with new, improved clamps. Do all actions in accordance with the Accomplishment Instructions of Airbus Service Bulletin A300-28-6056, Revision 01, dated January 20, 2006.

Action 5--Inspect the Wire Looms

(h) For all airplanes identified in paragraphs (h)(1) and (h)(2) of this AD: Within 26 months after the effective date of this AD, do a general visual inspection of the wire looms on the wing trailing edge for improperly held wires in the clamps, restore the electrical bundles to good condition, and replace the affected nylon clamps with metallic clamps that have an elastomer lining. Do all applicable corrective action before further flight. Repeat the inspection thereafter at intervals not to exceed 26 months until all clamps have been replaced.

(1) For Model A300 B4-601, B4-603, B4-620, B4-622, B4-605R, B4- 622R, A300 F4-605R, F4-622R, and C4-605R Variant F airplanes; except those on which Airbus Modification 6478 has been done: Do the actions specified in paragraph (h) of this AD in accordance with the Accomplishment Instructions of Airbus Service Bulletin A300-24-6004, Revision 04, dated November 15, 2005.

(2) For Model A310 airplanes, except those on which Airbus Modification 6478 has been done: Do the actions specified in paragraph (h) of this AD in accordance with the Accomplishment Instructions of Airbus Service Bulletin A310-24-2009, Revision 04, dated November 15, 2005.

Action 6--Improve the Quality of the Electrical Routes

(i) For all airplanes identified in paragraphs (i)(1), (i)(2), and (i)(3) of this AD: Within 26 months after the effective date of this AD, replace the nylon clamps of the electrical routes in the hydraulic compartment and in the shroud box with new metallic clamps that have white silicone lining (for airplanes identified in paragraph (i)(1) of this AD); and/or replace the nylon clamps and change the location of routes 1P and 2P to improve the retention of the wiring loom (for airplanes identified in paragraphs (i)(2) and (i)(3) of this AD); as applicable.

(1) For Model A300 airplanes; except those on which Airbus Modification 11763 has been done: Do the actions specified in paragraph (i) of this AD in accordance with the Accomplishment Instructions of Airbus Service Bulletin A300-24-0100, dated April 7, 2005.

(2) For Model A300 B4-601, B4-603, B4-620, B4-622, B4-605R, B4- 622R, A300 F4-605R, F4-622R, and C4-605R Variant F airplanes; except those on which Airbus Modifications 11763 and 12995 have been done: Do the actions specified in paragraph (i) of this AD in accordance with the Accomplishment Instructions of Airbus Service Bulletin A300-24-6084, Revision 01, dated June 28, 2005.

(3) For Model A310 airplanes, except those on which Airbus Modification 11763 has been done: Do the actions specified in paragraph (i) of this AD in accordance with the Accomplishment Instructions of Airbus Service Bulletin A310-24-2091, dated March 4, 2005.

Parts Installation

(j) After the effective date of this AD, no person may install on any airplane plate assemblies with part numbers A5351088000000 or A5351088000100 unless they have been modified in accordance with paragraph (f) of this AD.

Actions Accomplished According to Previous Revisions of Service Bulletins

(k) Actions done before the effective date of this AD in accordance with the service bulletins identified in Table 1 of this AD are acceptable for compliance with the corresponding requirements in this AD.

Table 1.--Previous Revisions of Service Bulletins

Airbus Service Bulletin
Revision Level
Date
A300-24-0085
Original
December 12, 1994
A300-24-0085
03
January 17, 1996
A300-24-0085
04
July 23, 1996
A300-24-0085
05
March 6, 2001
A300-24-6004
1
January 28, 1988
A300-24-6004
2
February 24, 1995
A300-24-6004
03
June 30, 1998
A300-24-6043
Original
December 12, 1994
A300-24-6043
01
February 7, 1995
A300-24-6043
02
May 10, 1995
A300-24-6043
03
January 17, 1996
A300-24-6043
04
March 6, 2001
A300-24-6043
05
August 30, 2001
A300-24-6043
06
October 13, 2005
A300-24-6084
Original
March 4, 2005
A300-28-6056
Original
February 18, 1998
A310-24-2009
Original
May 31, 1985
A310-24-2009
1
January 28, 1988
A310-24-2009
2
February 24, 1995
A310-24-2009
03
June 30, 1998

Alternative Methods of Compliance (AMOCs)

(l)(1) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14CFR 39.19.

(2) Before using any AMOC approved in accordance with Sec. 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office.

Related Information

(m) European Aviation Safety Agency airworthiness directive 2006-0074, dated April 3, 2006, also addresses the subject of this AD.

Material Incorporated by Reference

(n) You must use the service information specified in Table 2 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Airbus, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html .

Table 2.--Material Incorporated by Reference

Airbus Service Bulletin
Revision Level
Date
A300-24-0085
06
October 13, 2005
A300-24-0100
Original
April 7, 2005
A300-24-6004
04
November 15, 2005
A300-24-6043
07
October 11, 2006
A300-24-6084
01
June 28, 2005
A300-28-6056
01
January 20, 2006
A310-24-2009
04
November 15, 2005
A310-24-2091
Original
March 4, 2005

Examining the Docket

You may examine the AD docket on the Internet at http://dms.dot.gov or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647-5227) is located on the plaza level of the Nassif Building at the street address stated in the ADDRESSES section.

Discussion

The FAA issued a supplemental notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to all Airbus Model A300 airplanes; 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 A310 airplanes. That supplemental NPRM was published in the Federal Register on September 11, 2006 (71 FR 53341). That supplemental NPRM proposed to require the actions in the original NPRM, which were improving the routing of certain electrical wire bundles in certain airplane zones, as applicable to the airplane model. That supplemental NPRM also revised the original NPRM by removing certain proposed requirements, and extending the compliance time for a certain replacement. That supplemental NPRM also specified that the actions are considered interim until a terminating action for the removed proposed requirements is approved and available.

Relevant Service Information

Since we issued the supplemental NPRM, we have reviewed and approved the service bulletins listed in the following table. We referred to earlier revisions of these service bulletins as appropriate sources of service information for accomplishing certain actions in the supplemental NPRM. We have changed paragraphs (f)(2), (g), (h)(1), and (h)(2), and Table 1 of this AD to include references to these new revisions, and to give credit for accomplishment of previous revisions. The changes in the service information do not change the scope of the AD.New Revisions of Certain Service Bulletins

Airbus Service Bulletin
Was Issued to
A300-24-6004, Revision 04, dated November 15, 2005
Change the manufacturer s serial numbers in Paragraph 1.A. Effectivity.
Specify that the service bulletin has been rendered mandatory in France.
Give the European Aviation Safety Agency (EASA) designation organization approval number.
Include references to certain other documents.
Update certain access and test information.
Include a note regarding the removal of a certain clamp.
A300-24-6043, Revision 07, dated October 11, 2006
Change the manufacturer s serial numbers in Paragraph 1.A. Effectivity.
Revise manpower estimates.
Include references to certain other documents.
Revise materials description.
Add a note regarding the size of certain clamps.
A300-28-6056, Revision 01, dated January 20, 2006
Change the manufacturer s serial numbers in Paragraph 1.A. Effectivity.
Specify that the service bulletin is part of the fuel safety assessment program.
Specify that the service bulletin has been rendered mandatory in France.
Include references to certain other documents.
Update material, price, and industry support information.
Update certain access and part number information.
A310-24-2009, Revision 04, dated November 15, 2005
Change the manufacturer s serial numbers in Paragraph 1.A. Effectivity.
Specify that the service bulletin has been rendered mandatory in France.
Give the EASA designation organization approval number.
Include references to certain other documents.
Update certain access and test information.
Include a note regarding the removal of a certain clamp.

Comments

We provided the public the opportunity to participate in the development of this AD. We have considered the comment received.

Request To Change Incorporation of Certain Information

The Modification and Replacement Parts Association (MARPA) states that, typically, airworthiness directives are based on service information originating with the type certificate holder or its suppliers. MARPA adds that manufacturer service documents are privately authored instruments generally having copyright protection against duplication and distribution. MARPA notes that when a service document is incorporated by reference into a public document, such as an airworthiness directive, it loses its private, protected status and becomes a public document. MARPA adds that if a service document is used as a mandatory element of compliance, it should not simply be referenced, but should be incorporated into the regulatory document; by definition, public laws must be public, which means they cannot rely upon private writings. MARPA is concerned that the failure to incorporate essential service
information could result in a court decision invalidating the AD.

MARPA adds that incorporated by reference service documents should be made available to the public by publication in the Docket Management System (DMS), keyed to the action that incorporates them. MARPA notes that the stated purpose of the incorporation by reference method is brevity, to keep from expanding the Federal Register needlessly by publishing documents already in the hands of the affected individuals; traditionally, "affected individuals'' means aircraft owners and operators, who are generally provided service information by the manufacturer. MARPA adds that a new class of affected individuals has emerged, since the majority of aircraft maintenance is now performed by specialty shops instead of aircraft owners and operators. MARPA notes that this new class includes maintenance and repair organizations, component servicing and repair shops, parts purveyors and distributors, and organizations manufacturing or servicing alternatively certified parts under part 21 of the Federal Aviation Regulations (14 CFR part 21), Sec. 21.303 (parts manufacturer approval) (PMA). MARPAadds that the concept of brevity is now nearly archaic as documents exist more frequently in electronic format than on paper. Therefore, MARPA asks that the service documents deemed essential to the accomplishment of the NPRM be incorporated by reference into the regulatory instrument, and published in the DMS.

We understand MARPAs comment concerning incorporation by reference. The Office of the Federal Register (OFR) requires that documents that are necessary to accomplish the requirements of the AD be incorporated by reference during the final rule phase of rulemaking. This final rule incorporates by reference the document necessary for the accomplishment of the requirements mandated by this AD. Further, we point out that while documents that are incorporated by reference do become public information, they do not lose their copyright protection. For that reason, we advise the public to contact the manufacturer to obtain copies of the referenced service information.

Additionally, we do not publish service documents in DMS. We are currently reviewing our practice of publishing proprietary service information. Once we have thoroughly examined all aspects of this issue, and have made a final determination, we will consider whether our current practice needs to be revised. However, we consider that to delay this AD action for that reason would be inappropriate, since we have determined that an unsafe condition exists and that the requirements in this AD must be accomplished to ensure continued safety. Therefore, we have not changed the AD in this regard.

Clarification of Paragraph (f)(2)

We have clarified paragraph (f)(2) of this AD to specify the intended paragraph identifier referenced in that paragraph.

Conclusion

We have carefully reviewed the available data, including the comment received, and determined that air safety and the public interest require adopting the AD with the change described previously. We have determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD.

Interim Action

We consider this AD interim action. The EASA, which is the airworthiness authority for the European Union, has informed us that the manufacturer is currently developing an additional modification that will address the unsafe condition identified in this AD. Once this modification is developed, approved, and available, we may consider additional rulemaking.

Costs of Compliance

The following table provides the estimated costs for U.S. operators to comply with this AD.

This AD affects about 169 airplanes of U.S. registry. The following table provides the estimated costs for U.S. operators to comply with this AD. The average labor rate is $80 per work hour.

Estimated Costs

For Airplanes on Which This Action is Required
Work hours
Parts
Cost per airplane
Action 3, Modify the retaining and protection system
4 to 16
$836 to $1,056
$1,156to $2,336
Action 4, Modify the electrical wiring of routes 1P and 2P
2
$720
$880
Action 5, Inspect the wire looms on the wing trailing edge
8
Operator Supplied
$640
Action 6, Replace the nylon clamps of the electrical routes in the hydraulic compartment and in the shroud box
44 to 98
$100 to $5,700
$3,620 to $13,540

Based on these figures, the estimated cost of the AD for U.S. operators is up to $2,939,924, or up to $17,396 per airplane.

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 have 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 that this AD:

(1) Is not a "significant regulatory action'' under Executive Order 12866;

(2) Is not a "significant rule'' under 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. See the ADDRESSES section for a location to examine the regulatory evaluation.

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

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 Federal Aviation Administration (FAA) amends Sec. 39.13 by adding the following new airworthiness directive (AD):