94-24-01: Flap Torque Shaft Assembly

94-24-01 JETSTREAM AIRCRAFT LIMITED: Amendment 39-9074; Docket No. 94-CE- 02-AD. Supersedes AD 87-04-04, Amendment 39-5529, and AD 89-16-02, Amendment 39- 6273. Applicability: HP 137 Mk1, Jetstream Series 200, and Jetstream Models 3101 and 3201 airplanes (all serial numbers), certificated in any category. Compliance: Required within the next 50 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished. To prevent failure of the flap torque shaft assembly, which could result in asymmetric flap deployment and loss of control of the airplane, accomplish the following: NOTE 1: The effective date of this AD is more than 12 months after the issue date of this AD. This will allow operators time to schedule the flap torque shaft assembly replacement. The requirements of AD 87-04-04 and AD 89-16-02 will apply until the effective date of this AD or until the installation or modification specified by paragraph (a) of this AD is accomplished, whichever occurs first. (a) Install an improved torque shaft assembly in accordance with Part 1 of the ACCOMPLISHMENT INSTRUCTIONS section of Jetstream Aircraft Limited Service Bulletin (SB) No. 27-JA 920340; or modify the existing torque shaft assembly in accordance with Part 2 of the ACCOMPLISHMENT INSTRUCTIONS section of Jetstream Aircraft Limited SB No. 27- JA 920340, which incorporates the following pages: Pages Revision Level Date 1 through 6 and 9 through 16 2 December 21, 1993 7, 8, and 17 through 28 Original Issue September 2, 1992 (b) The life limit requirements of the torque tube shaft assembly required by AD 87- 04-04, and the repetitive inspections of the universal joints and universal joint rivets required by AD 89-16-02 remain mandatory until the effective date of this AD or upon accomplishing the installation or modification referenced by paragraph (a) of this AD, whichever occurs first. (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. (d) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Brussels Aircraft Certification Office (ACO), Europe, Africa, Middle East office, FAA, c/o American Embassy, 1000 Brussels, Belgium. The request should be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Brussels ACO. NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Brussels ACO. (e) The installation or modification required by this AD shall be done in accordance with Jetstream Service Bulletin No. 27-JA 920340: Pages Revision Level Date 1 through 6 and 9 through 16 2 December 21, 1993 7, 8, and 17 through 28 Original Issue September 2, 1992 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 Jetstream Aircraft Limited, Manager Product Support, Prestwick Airport, Ayrshire, KA9 2RW Scotland; or Jetstream Aircraft Inc., Librarian, P.O. Box 16029, Dulles International Airport, Washington, DC. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment (39-9074) supersedes both AD 87-04-04, Amendment 39-5529, and AD 89-16-02, Amendment 39-6273. (g) This amendment becomes effective on December 1, 1995.