AD 98-11-08

This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A300, A310, and A300-600 series airplanes, that requires replacement of the non-return valves located in the engine fuel feed lines on the outer fuel tank with new return valves; and, for certain airplanes, replacement of the inner tank booster pump canisters with modified canisters. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent sticking of non-return valves located in the fuel system, which could result in an internal fuel transfer from the center tank to the inner or outer tank. Such a transfer of fuel could lead to fuel spillage overboard through the vent system, and consequent insufficient fuel for the airplane to reach its flight destination.

Final rule.

98-11-08 AIRBUS INDUSTRIE: Amendment 39-10535. Docket 98-NM-13-AD.

Applicability: Model A300, A310, and A300-600 series airplanes; on which Airbus Modification 8928 or 6094 has not been installed; certificated in any category.

NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance:Required as indicated, unless accomplished previously.

To prevent sticking of non-return valves located in the fuel system, which could result in fuel spillage overboard and consequent insufficient fuel for the airplane to reach its flight destination, accomplish the following:

(a) Within 18 months after the effective date of this AD, accomplish paragraphs (a)(1) and (a)(2) of this AD, as applicable.

(1) For airplanes on which Airbus Modification 8928 has not been installed: Replace the non-return valves located in the engine fuel feed lines on the outer fuel tank with new non-return valves, in accordance with Airbus Service Bulletin A300-28-0063, Revision 01 (for Model A300 series airplanes); Airbus Service Bulletin A310-28-2053, Revision 01 (for Model A310 series airplanes); or Airbus Service Bulletin A300-28-6031, Revision 01 (for Model A300-600 series airplanes); all dated January 15, 1997; as applicable.

(2) For extended range twin-engine operations (ETOPS) airplanes, or airplanes equipped with auxiliary tanks; on which Airbus Modification 6094 has not been installed: Replace the inner tank booster pump canisters with modified canisters, in accordance with Airbus Service Bulletin A300-28-0071 (for Model A300 series airplanes); A310-28-2124 (for Model A310 series airplanes); or A300-28-6054 (for Model A300-600 series airplanes); all dated January 15, 1997; as applicable.

(b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, International Branch, ANM-116.

NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116.

(c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished.

(d) The actions shall be done in accordance with the following Airbus Service Bulletins, as applicable:
A300-28-0063, Revision 01, dated January 15, 1997;
A310-28-2053, Revision 01, dated January 15, 1997;
A300-28-6031, Revision 01, dated January 15, 1997;
A300-28-0071, dated January 15, 1997;
A310-28-2124, dated January 15, 1997; and
A300-28-6054, dated January 15, 1997.

This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Airbus Industrie, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

NOTE 3: The subject of this AD is addressed in French airworthiness directive 97-082- 215(B), dated March 12, 1997.

(e) This amendment becomes effective on June 24, 1998.

A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to include an airworthiness directive (AD) that is applicable to certain Airbus Model A300, A310, and A300-600 series airplanes was published in the Federal Register on March 27, 1998 (63 FR 14849). That action proposed to require replacement of the non-return valves located in the engine fuel feed lines on the outer fuel tank with new return valves; and, for certain airplanes, replacement of the inner tank booster pump canisters with modified canisters.

Comments
Interested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the single comment received.

The commenter supports the proposed rule.

Conclusion
After careful review of the available data, including the comment noted above, the FAA has determined that air safety and the public interest require the adoption of the rule as proposed.Cost Impact
The FAA estimates that 103 Model A300, A310, and A300-600 series airplanes of U.S. registry will be affected by this AD.

The FAA estimates that the required replacement of the non-return valves will take approximately 66 work hours per airplane to accomplish, at an average labor rate of $60 per work hour. Required parts will be supplied by the manufacturer at no cost to the operators. Based on these figures, the cost impact of this action required by this AD on U.S. operators is estimated to be $407,880, or $3,960 per airplane.

The FAA estimates that the required replacement of the inner fuel tank booster pump canisters will take approximately 12 work hours per airplane to accomplish, at an average labor rate of $60 per work hour. Required parts will be supplied by the manufacturer at no cost to the operators. Based on these figures, the cost impact of this action required by this AD on U.S. operators is estimated to be $74,160, or $720 per airplane.

The cost impact figures discussed above are based on assumptions that no operator has yet accomplished any of the requirements of this AD action, and that no operator would accomplish those actions in the future if this AD were not adopted.

Regulatory Impact
The regulations adopted herein will not have substantial direct effects 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. Therefore, in accordance with Executive Order 12612, it is determined that this final rule does not have sufficient federalism implications to warrant the preparation of a Federalism Assessment.

For the reasons discussed above, I certify that this action (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. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption "ADDRESSES."

List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

Adoption of the Amendment
Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (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.
39.13 [Amended]
2. Section 39.13 is amended by adding the following new airworthiness directive: