AD 90-11-05

90-11-05 AIRBUS INDUSTRIE: Amendment 39-6603. Docket No. 89-NM-223-AD.

Applicability: Model A300 series airplanes, as listed in Airbus Industrie Service Bulletin A300-57-142, dated December 17, 1986, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent failure of the outer shroud box aft hinge brackets, accomplish the following:

A. Prior to the accumulation of 5,000 landings, or within the next 300 landings after the effective date of this AD, whichever occurs later, perform a detailed visual inspection to detect cracks in the outer shroud box aft hinge brackets, in accordance with Airbus Industrie Service Bulletin A300-57-142, dated December 17, 1986.

B. If no cracks are found, repeat the inspection required by paragraph A., above, at intervals not to exceed 1,000 landings.

C. If cracks are found, prior to further flight, perform a detailed visual inspection to detect cracks or damage in the remaining supports (shroud box forward hinge brackets, inner shroud box forward attachments, and the attachment brackets at the inboard end of the inner box shroud box), in the inner and outer shroud box structure in the vicinity of the failed bracket, and the top skin of the inboard flap, in accordance with the Airbus Industrie Service Bulletin A300-57- 142, dated December 17, 1986.

1. If cracks or damage is found in the remaining supports, the inner and outer shroud box structure, or top skin of the inboard flap, repair prior to further flight in a manner approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region.

2. If any bracket is found to be cracked, damaged, or otherwise failed, replace the bracket with a serviceable part prior to further flight. a. If the bracket is replaced with an improved steel bracket (Modification 6661H1033), in accordance with Airbus Industrie Service Bulletin A300-57-142, dated December 17, 1986, or AirbusIndustrie Service Bulletin A300-57-143, Revision 2, dated July 10, 1989, the repetitive inspection of that bracket, as required by paragraph A., above, may be terminated. b. If the bracket is replaced with other than an improved steel bracket, repeat the inspection required by paragraph A. above, prior to the accumulation of 5,000 landings on the new bracket, and thereafter at intervals not to exceed 1,000 landings.

D. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Standardization Branch, ANM-113, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Standardization Branch, ANM-113.

E. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with therequirements of this AD.

All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Airbus Industrie, Airbus Support Division, Avenue Didier Daurat, 31700 Blagnac, France. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Standardization Branch, 9010 East Marginal Way South, Seattle, Washington.

This amendment (39-6603, AD 90-11-05) becomes effective on June 19, 1990.