AD 98-13-03 Airworthiness Directives; British Aerospace Model H.P. 137 Mk1, Jetstream Series 200, and Jetstream Model 3101 Airplanes.

The following model and serial number airplanes, certificated in any category, that do not have improved design main landing gear (MLG) fittings, part number (P/N) 1379133B1 and 1379133B2 (Modification 5218), installed in accordance with Jetstream Service Bulletin (SB) 57-JM 5218: ------------------------------------------------------------------------ Model Serial Nos. ------------------------------------------------------------------------ H.P. 137 MK1......................... All serial numbers. Jetstream Series 200................. All serial numbers. Jetstream Model 3101................. 601 through 695. ------------------------------------------------------------------------ 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 (f) 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 after the effective date of this AD, unless already accomplished. To prevent structural failure of the MLG caused by fatigue cracking, which could [[Page 33535]] result in loss of control of the airplane during landing operations, accomplish the following: Note 2: The compliance times of this AD are presented in landings. If the total number of airplane landings is not kept or is unknown, hours time-in-service (TIS) may be used by multiplying the total number of airplane hours TIS by 0.75. (a) For the H.P. 137 MK1 and Jetstream series 200 airplanes, within the next 50 landings after the effective date of this AD or within 200 landings after the last inspection required by AD 82-20- 04 R1 (superseded by this AD), whichever occurs first, and thereafter at intervals not to exceed 200 landings, accomplish the following in accordance with British Aerospace Mandatory Service Bulletin (MSB) No. 7/5, which incorporates the following pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 2 and 4....................... Original Issue.. March 31, 1982. 1 and 3....................... Revision 1...... May 23, 1988. ------------------------------------------------------------------------ (1) Inspect the MLG hinge attachment nuts to auxiliary and aft spars on both the left and right MLG for signs of fuel leakage or signs of relative movement between the nuts and hinge fitting. (2) If any signs of fuel leakage or relative movement between the nuts and hinge fitting are found, prior to further flight, resecure the MLG hinge fitting to auxiliary spar in accordance with actions 3.8 through 3.16 of British Aerospace MSB No. 7/5. (b) Upon accumulating 4,000 landings on the left and right MLG fittings or within the next 50 landings after the effective date of this AD, whichever occurs later, and thereafter at intervals not to exceed 400 landings, inspect the MLG hinge support angles for cracks in accordance with the following, as applicable: (1) For the H.P. 137 MK1 and Jetstream series 200 airplanes: British Aerospace MSB 7/8, which incorporates the following effective pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 2, 5, 6, 7, and 8............. Revision 2...... January 6, 1983. 1, 3, and 4................... Revision 3...... May 23, 1988. ------------------------------------------------------------------------ (2) For the Jetstream Model 3101 airplanes: Jetstream Alert Service Bulletin (ASB) 32-A-JA 850127, which incorporates the following effective pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 5 through 14.................. Original Issue.. April 17, 1985. 1 through 4................... Revision 2...... November 11, 1994. ------------------------------------------------------------------------ (c) Install improved design MLG fittings, part number (P/N) 1379133B1 and 1379133B2 (Modification 5218), as applicable. Perform these installations at the applicable compliance time presented below (paragraphs (c)(1) and (c)(2) of this AD). Accomplish this installation in accordance with Jetstream Service Bulletin (SB) 57-JM 5218, which incorporates the following effective pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 3, 5, 6, 7, 8, 9, 11, 12, 17, Revision 1...... September 29, 1987. 18, 19, 21, 22, 23, 24, 27, 28, 29, 30, and 31. 25 and 26..................... Revision 2...... August 24, 1988. 10 and 20..................... Revision 3...... January 29, 1990. 1, 2, 4, 13, 14, 15, and 16... Revision 4...... October 31, 1990. ------------------------------------------------------------------------ (1) Prior to further flight on any fitting found cracked during an inspection required by paragraph (b) of this AD; and (2) Upon accumulating 20,000 landings on the left MLG fitting or within the next 50 landings after the effective date of this AD (whichever occurs later), unless already accomplished as required by paragraph (c)(1) of this AD; and (3) Upon accumulating 20,000 landings on the right MLG fitting or within the next 50 landings after the effective date of this AD (whichever occurs later), unless already accomplished as required by paragraph (c)(1) of this AD. (d) Incorporating both P/N 1379133B1 and P/N 1379133B2 MLG fittings (Modification 5218) as required by paragraph (c), including all subparagraphs, of this AD terminates the repetitive inspection requirement of paragraph (a) of this AD. The repetitive inspections of the MLG support angles required by paragraph (b) of this AD are still required. (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. (f) An alternative method of compliance or adjustment of the initial or repetitive compliance times that provides an equivalent level of safety may be approved by the Manager, Small Airplane Directorate, 1201 Walnut, suite 900, Kansas City, Missouri 64106. (1) The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Small Airplane Directorate. (2) Alternative methods of compliance approved in accordance with AD 82-20-04 R1 (superseded by this action) are not considered approved as alternative methods of compliance with this AD. 4Note 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate. (g) Questions or technical information related to the service information referenced in this AD should be directed to British Aerospace Regional Aircraft, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland; telephone: (01292) 479888; facsimile: (01292) 671715. This service information may be examined at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106. (h) The inspections, modifications, and installations required by this AD shall be done in accordance with the following: --British Aerospace Jetstream Mandatory Service Bulletin No. 7/5, which incorporates the following pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 2 and 4....................... Original Issue.. March 31, 1982. 1 and 3....................... Revision 1...... May 23, 1988. ------------------------------------------------------------------------ --British Aerospace Mandatory Service Bulletin No. 7/8, which incorporates the following effective pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 2, 5, 6, 7, and 8............. Revision 2...... January 6, 1983. 1, 3, and 4................... Revision 3...... May 23, 1988. ------------------------------------------------------------------------ --Jetstream Alert Service Bulletin 32-A-JA 850127, which incorporates the following effective pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 5 through 14.................. Original Issue.. April 17, 1985. [[Page 33536]] 1 through 4................... Revision 2...... November 11, 1994. ------------------------------------------------------------------------ --Jetstream Service Bulletin 57-JM 5218, which incorporates the following effective pages: ------------------------------------------------------------------------ Pages Revision level Date ------------------------------------------------------------------------ 3, 5, 6, 7, 8, 9, 11, 12, 17, Revision 1...... September 29, 1987. 18, 19, 21, 22, 23, 24, 27, 28, 29, 30, and 31. 25 and 26..................... Revision 2...... August 24, 1988. 10 and 20..................... Revision 3...... January 29, 1990. 1, 2, 4, 13, 14, 15, and 16... Revision 4...... October 31, 1990. ------------------------------------------------------------------------ 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 British Aerospace Regional Aircraft, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland. Copies may be inspected at the FAA, Central Region, Office of the Regional 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. (i) This amendment supersedes AD 82-20-04 R1, mendment 39-4468. (j) This amendment becomes effective on August 3, 998. Issued in Kansas City, Missouri, on June 8, 1998. Michael Gallagher, Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 98-15884 Filed 6-18-98; 8:45 am] BILLING CODE 4910-13-U