Airworthiness Directive · Amendment 39-16699 · Landing gear
British Aerospace Regional Aircraft Model HP.137 Jetstream Mk.1, Jetstream Series 200, Jetstream Series 3101, and Jetstream Model 3201 Airplanes
This AD applies to British Aerospace Regional Aircraft Model HP.137 Jetstream Mk.1, Jetstream Series 200, Jetstream Series 3101, and Jetstream Model 3201 airplanes, all serial numbers, that are:
(1) Equipped with main landing gear (MLG) fittings, part number (P/N) 1379133B1/B2/B3/B4 that incorporate Modifications JM5218 or JM8003; and
(2) Certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions:
(1) Upon accumulating 41,000 flight cycles (landings) on the MLG since first installation or within the next 2,000 flight cycles (landings) on the MLG after June 22, 2011 (the effective date of this AD), whichever occurs later, eddy current inspect all the MLG leg pivot beam fastener bores for cracks. Do the inspections following British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-JA090240, Revision 1, dated January 18, 2010.
(2) Before further flight after any inspection required in paragraphs (f)(1), (f)(2)(i), (f)(2)(ii), and (f)(3) of this AD in which cracks are found, replace the MLG fitting or repair any cracks. Cracks are defined in paragraph 2.D.(4) of British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-JA090240, Revision 1, dated January 18, 2010. Replace or repair the MLG fitting following British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-JA090240, Revision 1, dated January 18, 2010. Any time the MLG fitting is repaired or replaced, do the following actions as applicable:
(i) MLG fitting is replaced with a new MLG fitting as specified in paragraph (f)(2) of this AD: Upon accumulating 41,000 flight cycles (landings) after replacement, eddy current inspect all the MLG leg pivot beam fastener bores for cracks. Do the inspections following British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-JA090240, Revision 1, dated January 18, 2010.
(ii) MGL fitting is repaired as specified in paragraph (f)(2) of this AD: Upon accumulating 27,000 flight cycles (landings) after the last repair and repetitively thereafter at intervals not to exceed 27,000 flight cycles (landings), eddy current inspect all the MLG leg pivot beam fastener bores for cracks. Do the inspections following British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-JA090240, Revision 1, dated January 18, 2010.
(3) If no cracks are found during any inspection required in paragraph (f)(1), (f)(2)(i), or (f)(2)(ii) of this AD, repetitively thereafter upon accumulating 27,000 flight cycles (landings) after the last inspection, eddy current inspect all the MLG leg pivot beam fastener bores for cracks.
(4) As of June 22, 2011 (the effective date of this AD), only install a MLG fitting specified in paragraph (c)(1) of this AD that has been eddy current inspected and found free of cracks following British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-JA090240, Revision 1, dated January 18, 2010.
(5) Some of the compliance times of this AD are presented in flight cycles (landings). If the total flight cycles have not been kept, multiply the total number of airplane hours time-in-service by 0.75. For the purposes of this AD:
(i) 75 cycles equals 100 hours TIS; and
(ii) 750 cycles equals 1,000 hours TIS.
Note 1: Credit will be given for the inspection required in paragraph (f)(1) of this AD and the corrective action required in paragraph (f)(2) of this AD if already done before June 22, 2011 (the effective date of this AD) following British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-JA090240, original issue dated April 29, 2009; and BEA Systems All Operator Message: Ref 09-014J-1, issue 1, dated July 31, 2009.
Note 2: This AD differs from the MCAI and/or service information as follows: No differences.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
