Airworthiness directives › 2015-17-17
AD 2015-17-17 Airworthiness Directives; Pratt & Whitney Turbofan Engines
Applicability*9
This AD applies to all Pratt & Whitney (PW) PW4164-1D, PW4168-1D, PW4168A-1D and PW4170 engines; and all PW4164, PW4168, and PW4168A turbofan engines that have incorporated either PW Service Bulletin (SB) No. PW4G-100-72-214, dated December 15, 2011 or PW SB No. PW4G-100-72-219, Revision 1, dated October 5, 2011.
Compliance
As terminating action to the repetitive inspection requirements in paragraph (e)(1) of this AD do the following: (1) Inspect all fuel nozzle-to-fuel supply manifold interfaces for fuel leaks, soot, and coke formation, replace hardware that fails inspection, and re-torque all fuel nozzle-to-fuel supply manifold B-nuts as follows: (i) For engines with fewer than 1,500 cycles on the effective date of this AD, before accumulating another 650 cycles, not to exceed 1,900 cycles. (ii) For engines with 1,500 cycles or more, but less than 2,500 cycles on the effective date of this AD, before accumulating another 400 cycles, not to exceed 2,700 cycles. (iii) For engines with 2,500 cycles or more on the effective date of this AD, before accumulating another 200 cycles. (2) Use the Accomplishment Instructions, Parts B through E, of PW ASB No. PW4G-100-A73-44, Revision 1, dated February 12, 2015 to do the inspection, replacement, and retorqueing.
Required actions
This paragraph provides credit for the actions required by paragraphs (e) and (f) of this AD, if the actions were performed before the effective date of this AD, using the procedures specified in PW ASB No. PW4G-100-A73-44, dated October 10, 2014 or Special Instruction 129F-14.
Unsafe condition
Comply with this AD within the compliance times specified, unless already done. (1) Within 800 flight hours after the effective date of this AD, and within every 800 flight hours since last inspection thereafter, inspect all fuel nozzle-to-fuel supply manifold interfaces for evidence of fuel leaks, soot, and coke formation. Use the Accomplishment Instructions, Part A, of PW Alert Service Bulletin (ASB) No. PW4G-100-A73-44, Revision 1, dated February 12, 2015 to do the inspections. (2) Replace hardware that fails an inspection. Use the Accomplishment Instructions, Part A, of PW ASB No. PW4G-100-A73-44, Revision 1, dated February 12, 2015 to do the replacement.
Affected ADs
None.
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