Airworthiness Directive · Amendment 39-18888 · Landing gear
British Aerospace Regional Aircraft Airplanes
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 Airworthiness Directive (AD) 2014-07-07 for British Aerospace Regional Aircraft Model HP 137 Jetstream MK1, 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 cracking. 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 (11) of this AD:
(1) For all airplanes: Before or at the next inspection that would have been required by AD 2014-07-07 or within the next 30 days after July 5, 2017 (the effective date of this AD), whichever occurs later, and repetitively thereafter at intervals not to exceed 12 months or 1,200 main landing gear (MLG) flight cycles (FC), whichever occurs first, do a nondestructive testing (NDT) inspection of each MLG assembly cylinder attachment spigot housing following the accomplishment instructions in Heroux Devtek Service Bulletin (SB) 32-19, Revision 7, dated March 16, 2015, as specified in the accomplishment instructions in paragraph 2.B. Part A of British Aerospace Jetstream Series 3100 & 3200 SB 32-A-JA851226, Revision 7, dated May 25, 2015.
(2) For all airplanes: Within 300 landings after a heavy or abnormal landing or within 3 months after a heavy or abnormal landing, whichever occurs first, do an NDT inspection of each MLG assembly cylinder attachment spigot housing following the accomplishment instructions in Heroux Devtek Service Bulletin (SB) 32-19, Revision 7, dated March 16, 2015, as specified in the accomplishment instructions in paragraph 2.B. Part A of British Aerospace Jetstream Series 3100 & 3200 SB 32-A-JA851226, Revision 7, dated May 25, 2015.
(3) For all airplanes: Within 3 months after accomplishment of the latest NDT inspection required by paragraph (f)(1) of this AD or 300 MLG FC after accomplishment of the latest NDT inspection required by paragraph (f)(1) of this AD, whichever occurs first, and repetitively thereafter at intervals not to exceed 3 months or within 300 MLG FC, whichever occurs first, do a visual inspection of each MLG following the accomplishment instructions in paragraph 2.B. Part B of British Aerospace Jetstream Series 3100 & 3200 SB 32-A-JA851226, Revision 7, dated May 25, 2015. These inspections start over after every repetitive NDT inspection required by paragraph (f)(1)of this AD.
(4) For all airplanes with a MLG incorporating a microswitch hole: Within the next 10,600 MLG FC since new and repetitively thereafter at intervals not to exceed 1,200 MLG flight cycles, do an NDT inspection of each MLG microswitch hole following the accomplishment instructions in paragraph 2.B. Part C of British Aerospace Jetstream Series 3100 & 3200 SB 32-A-JA851226, Revision 7, dated May 25, 2015.
(5) For all airplanes: If any discrepancy is found during any NDT inspection required in paragraphs (f)(1), (2), or (4) of this AD, before further flight, take all necessary corrective actions following the instructions in British Aerospace Jetstream Series 3100 & 3200 SB 32-A-JA851226, Revision 7, dated May 25, 2015.
(6) For all airplanes: If any discrepancy is found during any visual inspection required in paragraph (f)(3) of this AD, before further flight, take all necessary corrective actions following the instructions in British Aerospace Jetstream Series 3100 & 3200 SB 32-A-JA851226, Revision 7, dated May 25, 2015.
(7) For all airplanes: Doing all necessary corrective actions required in paragraphs (f)(5) or (6) of this AD does not constitute terminating action for the inspections required by this AD.
(8) For all airplanes: Modification of each MLG cylinder following BAE Systems (Operations) Ltd. SB 32-JA880340 original issue, dated January 6, 1989, constitutes terminating action for the inspections required by this AD for that MLG.
(9) For all airplanes: The compliance times in paragraphs (f)(1), (2), (3), and (4) 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.
(1) This AD allows credit for the initial inspection required in paragraph (f)(1) of this AD if done before June 3, 2014 (the effective date retained from AD 2014-07-07) following British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA851226, Revision 5, dated April 30, 2013.
(2) This AD allows credit for the initial inspection required in paragraph (f)(4) of this AD if done before June 3, 2014 (the effective date retained from AD 2014-07-07) following APPH Ltd. Service Bulletin 32-40, at Initial Issue dated June 21, 1989; or APPH Ltd. Service Bulletin 32-40, Revision 1, dated February, 2003.
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.
