99-03-06: Power Control Cable Assemblies and Pulleys

99-03-06 SHORT BROTHERS, PLC: Amendment 39-11020. Docket 98-NM-289-AD. Applicability: All Model SD3-60 SHERPA series airplanes; 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 (c) 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 breakage of the power control cable assemblies due to the inflexible construction of the cable, which could result in loss of engine power and consequent reduced controllability of the airplane, accomplish the following: (a) Within 1,200 flight hours after the effective date of this AD, perform a one-time visual inspection to determine the part number (P/N) of the power control cable assemblies and pulleys of the engine controls, in accordance with Part A of the Accomplishment Instructions of Shorts Service Bulletin SD3-60 SHERPA-76-1, dated July 1998, or Revision 1, dated October 14, 1998. (1) If any power control cable assembly having P/N SD3-47-1091 or SD3-47-1094 is found, prior to further flight, replace the power control cable assembly with a new power control cable assembly in accordance with Part B of the Accomplishment Instructions of the service bulletin. (2) If any pulley having P/N C181605 is found, prior to further flight, replace the pulley with a new pulley in accordance with Part C of the Accomplishment Instructions of the service bulletin. (b) As of the effective date of this AD, no person shall install on the engine controls of any airplane a cable assembly having P/N SD3-47-1091 or SD3-47-1094, or any pulley having P/N C181605. (c) 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 Manager, International Branch, ANM-116. (d) 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. (e) The inspection and replacement shall be done in accordance with Shorts Service Bulletin SD3-60 SHERPA-76-1, dated July 1998, or with Shorts Service Bulletin SD3-60 SHERPA-76-1, Revision 1, dated October 14, 1998, which contains the following list of effective pages: Page Number Revision Level Shown on Page Date Shown on Page 1-3, 7, 8, 10-16, 23, 29 1 July 1998 4-6, 9, 17-22, 24-28 Original October 14, 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 Short Brothers, Airworthiness & Engineering Quality, P.O. Box 241, Airport Road, Belfast BT3 9DZ, Northern Ireland. 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 British airworthiness directive 004-07-98. (f) This amendment becomes effective on March 11, 1999.