Airworthiness Directive · Amendment 39-17821 · Landing gear
British Aerospace (Operations) Limited Airplanes
Superseded. A later AD replaced this one: AD 2017-10-14. Comply with the one in force.
This AD applies to British Aerospace (Operations) Limited Model HP.137 Jetstream Mk.1, Jetstream Series 200, and Jetstream Series 3101 airplanes, all serial numbers, certificated in any category.
We are superseding an airworthiness directive (AD) 87-02-04 for British Aerospace (Operations) Limited Model HP.137 Jetstream MK.1, Jetstream Series 200, and Jetstream Series 3101 airplanes. 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 cracking of the forward main landing gear yoke pintle resulting from corrosion pits leading to stress corrosion. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions specified in paragraphs (f)(1) through (f)(11) of this AD:
(1) For airplanes that were affected by AD 87-02-04, Amendment 39-5497 (51 FR 47211, December 31, 1986): At the next 1,200 MLG flight cycle repetitive inspection that would have been required by AD 87-02-04 or within the next 12 months after the last 1,200 MLG flight cycle repetitive inspection that would have been required by AD 87-02-04, whichever occurs first, and repetitively thereafter at intervals not to exceed 1,200 MLG flight cycles or 12 months, whichever occurs first, do a nondestructive testing (NDT) inspection of each MLG assembly cylinder attachment spigot housing following the Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-19, Revision 4, dated April 3, 2013, and British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(2) For airplanes that were not affected by AD 87-02-04, Amendment 39-5497 (51 FR 47211, December 31, 1986): Within the next 300 MLG flight cycles after June 3, 2014 (the effective date of this AD) or within the next 3 months after June 3, 2014 (the effective date of this AD) or at the next overhaul of the MLG after June 3, 2014 (the effective date of this AD), whichever occurs first, and repetitively thereafter at intervals not to exceed 1,200 MLG flight cycles or 12 months, whichever occurs first, do a NDT inspection of each MLG assembly cylinder attachment spigot housing following the Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-19, Revision 4, dated April 3, 2013, and British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(3) For all airplanes: Within 300 landings after a heavy or abnormal landing, conduct a NDT inspection of each MLG assembly cylinder attachment spigot following Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-19, Revision 4, dated April 3, 2013, and British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(4) For all airplanes: If any crack is found during any inspection required in paragraphs (f)(1), (f)(2), or (f)(3) of this AD, before further flight, take all necessary corrective actions following the Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-19, Revision 4, dated April 3, 2013, and British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(5) For all airplanes: Within 300 MLG flight cycles or 3 months, whichever occurs first after each NDT inspection required in paragraph (f)(1) or (f)(2) of this AD, as applicable, and repetitively thereafter at intervals not to exceed 300 MLG flight cycles or 3 months, whichever occurs first, do a visual inspection of each MLG following the Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-19, Revision 4, dated April 3, 2013, and British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(6) For all airplanes: If any discrepancy is found during any visual inspection required in paragraph (f)(5) of this AD, before further flight, take all necessary corrective actions following the Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-19, Revision 4, dated April 3, 2013, and British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(7) For all airplanes with a MLG incorporating a microswitch hole: Within the next 10,600 MLG flight cycles since new and repetitively thereafter at intervals not to exceed 1,200 MLG flight cycles, do a NDT inspection of each MLG microswitch hole following the Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-40, Revision 1, dated February 2003, and Part C, paragraph (2)(b) of British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(8) For all airplanes: If any crack is found during any NDT inspection required in paragraph (f)(7) of this AD, before further flight, take all necessary corrective actions following the Accomplishment Instructions in APPH Ltd. Service Bulletin No. 32-40, Revision 1, dated February 2003, and British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(9) For all airplanes: Doing all necessary corrective actions required in paragraphs (f)(4), (f)(6), and (f)(8) of this AD does not constitute terminating action for the inspections required by this AD.
(10) For all airplanes: Modification of each MLG cylinder following Jetstream Service Bulletin 32-JA880340, original issue, dated January 6, 1989, constitutes terminating action for the inspections required by this AD for that MLG.
(11) For all airplanes: The compliance times in paragraphs (f)(2), (f)(3), (f)(5), and (f)(7) 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 (TIS) by 0.75 to calculate the cycles. For the purposes of this AD:
(i) 100 hours TIS ×.75 = 75 cycles; and
(ii) 1,000 hours TIS ×.75 = 750 cycles.
This AD allows credit for the initial inspection required in paragraph (f)(7) of this AD if done before June 3, 2014 (the effective date of this AD) following APPH Ltd. Service Bulletin 32-40, at Initial Issue dated June 21, 1989.
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.
