AD 2000-18-05 Airworthiness Directives; Aerospatiale Model ATR42 and ATR72 Series Airplanes

Models named: ATR42 series, ATR72 series. Read the applicability below — it usually turns on serial or part numbers too.

The following airplanes, certificated in any category: —Model ATR42 series airplanes, excluding those modified in accordance with Aerospatiale Matra ATR Modifications 4993, 4998, and 5008 —Model ATR72 series airplanes, excluding those modified in accordance with Aerospatiale Matra ATR Modifications 4994, 4997, and 5008 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 (d) 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.

Required as indicated, unless accomplished previously. To reduce the degradation of lift and drag characteristics in prolonged severe icing exposure, which could result in loss of lift and consequent reduced controllability of the airplane, accomplish the following: Boot Replacement/Installation (a) Within 30 months after the effective date of this AD, replace the median wing de-icing boots with extended de-icing boots in accordance with Avions de Transport Regional Service Bulletin ATR42-30-0063, Revision 2, dated October 1, 1999 (for Model ATR42 series airplanes), or ATR72-30-1032, Revision 2, dated October 1, 1999 (for Model ATR72 series airplanes); as applicable. (b) Within 30 months after the effective date of this AD, install de-icing boots on the metallic wing leading edge in accordance with Avions de Transport Regional Service Bulletin ATR42-30-0064, Revision 2, dated October 1, 1999 (for Model ATR42 series airplanes), or ATR72-30-1033, Revision 2, dated October 1, 1999 (for Model ATR72 series airplanes); as applicable. Modification (c) Within 30 months after the effective date of this AD, modify the ICING light flashing logic of the Anti-icing Advisory System (AAS), in accordance with Avions de Transport Regional Service Bulletin ATR42-30-0065, Revision 2, dated October 25, 1999 (for Model ATR42 series airplanes), or Avions de Transport Regional Service Bulletin ATR72-30-1034, Revision 2, dated October 19, 1999 (for Model ATR72 series airplanes); as applicable. Note 2: Accomplishment of the boot replacement, boot installation, and modification is also considered acceptable for compliance with the applicable requirements of paragraphs (a), (b), and (c) of this AD, if accomplished in accordance with Revision 1 of the following Avions de Transport Regional service bulletins: (For Model ATR42 Series Airplanes) ATR42-30-0063, May 7, 1999, ATR42-30-0064, May 7, 1999, ATR42-30-0065, May 17, 1999 (For Model ATR72 Series Airplanes) ATR72-30-1032, May 7, 1999, ATR72-30-1033, May 7, 1999, ATR72-30-1034, May 17, 1999. Alternative Methods of Compliance (d) 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 3: 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 (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. Incorporation by Reference (f) The actions shall be done in accordance with the following Avions de Transport Regional Service Bulletins, as applicable:   Service bulletin and date Page numbers Revision level shown on the page Date shown on page ATR72-30-1032, Revision 2, October 1, 1999 1-10, 14-16, 33, 34, 43 2 October 1, 1999.   11-13, 17-32, 35-42, 44, 45 1 May 7, 1999. ATR72-30-1033, Revision 2, October 1, 1999 1, 2, 6, 7, 8, 15 2 October 1, 1999.   3-5, 9-14, 16-43 1 May 7, 1999. ATR72-30-1034, Revision 2, October 19, 1999 1, 2, 4, 8-31 2 October 19, 1999.   3 1 May 17, 1999.   5, 6, 7 ( 1 ) February 2, 1999. ATR42-30-0063, Revision 2, October 1, 1999 1-5, 9, 10, 13, 14, 16, 18, 19, 37, 38, 43, 47 2 October 1, 1999.   6-8, 11, 12, 15, 17, 20-36, 39-42, 44-46, 48, 49 1 May 7, 1999. ATR42-30-0064, Revision 2, October 1, 1999 1-5, 8-10, 12-14, 20, 21, 35-54, 59, 60 2 October 1, 1999.   6, 7, 11, 15-19, 22-34, 55-58, 61 1 May 7, 1999. ATR42-30-0065, Revision 2, October 25, 1999 1-5, 7-52 2 October 25, 1999.   6 1 May 17, 1999. 1  Original. 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 4: The subject of this AD is addressed in French airworthiness directives 1999-165-077(B) and 1999-166-041(B), both dated April 21, 1999. (g) This amendment becomes effective on October 13, 2000. Issued in Renton, Washington, on August 31, 2000. D.L. Riggin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 00-22908 Filed 9-7-00; 8:45 am] BILLING CODE 4910-13-P