99-18-06: Outer Wing

99-18-06 AEROSPATIALE: Amendment 39-11272. Docket 98-NM-201-AD. Applicability: Model ATR42-300 and ATR42-320 series airplanes, serial numbers 3 through 59 inclusive; certificated in any category. NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been 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 fatigue damage on the outer wing and consequent reduced structural integrity of the wing, accomplish the following: Corrective Action (a) Prior to the accumulation of 33,000 total landings, or within 2,000 landings after the effective date of this AD, whichever occurs later, accomplish paragraphs (a)(1) and (a)(2) of this AD in accordance with Avions de Transport Regional Service Bulletin ATR42-57-0050, dated April 17, 1998. (1) Perform a high frequency eddy current inspection to detect cracking of the fastener hole located on the lower surface of the outer wing near the spar/rib 15 junction. If any cracking is found, prior to further flight, repair the cracking in accordance with a method approved by either the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate, or the Direction G n rale de l'Aviation Civile (or its delegated agent). (2) Perform cold working of the fastener hole located on the lower surface of the outer wing near the spar/rib 15 junction, and install a new fastener in the hole. Alternative Methods of Compliance (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. 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. Special Flight Permits (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. Incorporation by Reference (d) Except as provided by paragraph (a)(1) of this AD, the actions shall be done in accordance with Avions de Transport Regional Service Bulletin ATR42-57-0050, dated April 17, 1998. 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 Aerospatiale, 316 Route de Bayonne, 31060 Toulouse, Cedex 03, 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 98-147- 075(B), dated April 8, 1998. (e) This amendment becomes effective on October 5, 1999.