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95-23-08 AVRO INTERNATIONAL AEROSPACE (Formerly British Aerospace): Amendment 39-9428. Docket 95-NM-210-AD.
Applicability: Model BAe 146 series airplanes; having constructors' numbers E2188, E2192, E3190, and E3194; 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 use the authority provided in paragraph (d) of this AD to request approval from the FAA. This approval may address either no action, if the current configuration eliminates the unsafe condition; or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any airplane from the applicability of this AD.
Compliance: Required as indicated, unless accomplished previously.
To prevent cracking and other problems associated with a decrease in the long-term damage tolerance residual strength of the wing, accomplish the following:
(a) Prior to the accumulation of 36,000 total landings or within 3 months after the effective date of this AD, whichever occurs later, remove the 4 fasteners from the rib 2 butt strap on the lower wing surface of the right-hand wing and accomplish the requirements of paragraphs (a)(1) and (a)(2) of this AD, in accordance with Avro Service Bulletin 57-40, dated March 19, 1994:
(1) Perform an eddy current inspection of each of the fastener holes to detect cracking.
(2) Perform a visual inspection of each of the fastener holes to detect evidence of damage, such as scoring that has resulted from removal of the bolts; and to check the diameter of each hole to determine if it is within the allowable tolerance specified in the service bulletin.
(b) If the fastener hole is free of cracks and damage, and if the hole's diameter is within the allowable tolerance, prior to further flight, install a new bolt in accordance with the service bulletin. Thereafter, repeat the inspections specified in paragraph (a) of this AD at intervals not to exceed 9,000 landings.
(c) If the hole is cracked or shows evidence of damage, or if the hole's diameter is outside the allowable tolerance, prior to further flight, oversize the hole, clean out the damage, and install a new bolt, in accordance with the service bulletin. Thereafter, repeat the inspections specified in paragraph (a) of this AD at intervals not to exceed 9,000 landings.
(d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safetymay be used if approved by the Manager, Standardization Branch, ANM-113, 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, Standardization Branch, ANM-113.
NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113.
(e) 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.
(f) The actions shall be done in accordance with Avro Service Bulletin 57-40, dated March 19, 1994. 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 British Aerospace Holdings, Inc., Avro International Aerospace Division, P.O. Box 16039, Dulles International Airport, Washington, DC 20041-6039. 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.
(g) This amendment becomes effective on December 1, 1995.
