93-21-07: Lift Spoiler

93-21-07 BRITISH AEROSPACE: Amendment 39-8721. Docket 93-NM-11-AD. Applicability: Model BAe 146 series airplanes equipped with a lift spoiler jack, part number P308-45-0002 or P308-45-0102; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent failure of the "LIFT SPOILER UNLOCKED" indication system, accomplish the following: (a) At the next scheduled maintenance inspection of the lift spoiler configuration warning microswitches, but no later than 15 months after the effective date of this AD, perform a functional test of the lift spoiler configuration warning microswitches in accordance with British Aerospace BAe 146 Inspection Service Bulletin S.B.27-137, dated November 17, 1992. (1) If all of the configuration microswitches operate properly, prior to further flight, no further action is required by this AD. However, entries in the airplane maintenance records that are to be transferred with the airplane must indicate the serial number of each affected lift spoiler jack. (2) If any configuration microswitch fails to operate properly, prior to further flight, replace the lift spoiler jack spindle with a jack on which the actions described in the service bulletin have been accomplished. Entries in the airplane maintenance records that are to be transferred with the airplane must indicate the serial number of each affected lift spoiler jack. (b) As of the effective date of this AD, no person shall install on any airplane a lift spoiler jack on which the actions described in British Aerospace BAe 146 Inspection Service Bulletin S.B.27-137, dated November 17, 1992, have not been accomplished. (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, 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: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch, ANM-113. (d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished. (e) The test shall be done in accordance with British Aerospace BAe 146 Inspection Service Bulletin S.B.27-137, dated November 17, 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 AVRO International Aerospace, Incorporated, 22111 Pacific Boulevard, Sterling, Virginia 20166. 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. (f) This amendment becomes effective on December 13, 1993.