Airworthiness directives › 2019-06-07
AD 2019-06-07 Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
Applicability*9
This AD applies to Pratt & Whitney Division (PW): (1) PW4164, PW4168, and PW4168A model turbofan engines that have fuel nozzles, part number (P/N) 51J345, installed, and that have any of the following installed: Talon IIB combustion chamber per Pratt & Whitney Service Bulletin (SB) PW4G-100-72-214, dated December 15, 2011; ring case configuration (RCC) high-pressure compressor (HPC) per Pratt & Whitney SB PW4G-100-72-219, Revision No. 1, dated October 5, 2011, or original issue; or the outer combustion chamber assembly waspaloy nuts per Pratt & Whitney SB PW4G-100-72-253, dated November 24, 2014; (2) PW4168A model engines with Talon IIA outer combustion chamber assembly, P/N 51J100 or 51J382, and fuel nozzles, P/N 51J345, installed; (3) PW4168A-1D and PW4170 model engines with engine serial numbers P735001 through P735190, inclusive, and fuel nozzles, P/N 51J345, installed; (4) PW4164-1D, PW4168-1D, PW4168A-1D, and PW4170 model turbofan engines that have installed the RCC HPC per Pratt & Whitney SB PW4G-100-72-220, Revision No. 4, dated September 30, 2011, or earlier revision, and have fuel nozzles, P/N 51J345, installed; and (5) PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 model turbofan engines with fuel nozzle, P/N 51J398, installed, that have not installed the replacement fuel nozzle supply manifold assemblies, and new brackets and clamps on the fuel nozzle supply manifold assemblies per Pratt & Whitney SB PW4G-100-73-48, Revision No. 1, dated April 24, 2018.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 800 flight hours (FHs) after December 6, 2016 (the effective date of AD 2016-22-05), or before further flight, whichever occurs later, and after that within every 800 FHs accumulated on the fuel nozzles, perform the following: (i) Inspect all fuel nozzles, P/N 51J345, in accordance with Part A of Pratt & Whitney Alert Service Bulletin (ASB) PW4G-100-A73-45, dated February 16, 2016. (ii) For any fuel nozzle that fails the inspection, before further flight, remove and replace with a part that is eligible for installation. (2) At the next shop visit or within 24 months after the effective date of this AD, whichever occurs first, remove all fuel nozzles, P/N 51J345, in accordance with Part A, of Pratt & Whitney ASB PW4G-100-A73-47, dated March 10, 2017, and replace with parts eligible for installation. (3) At the next shop visit or within 60 months after the effective date of this AD, whichever comes first, replace the fuel nozzle supply manifold assemblies and install the new brackets and clamps on the fuel nozzle supply manifold assembly in accordance with Accomplishment Instructions, “For Engines Installed on Aircraft” or “For Engines Not Installed on Aircraft,” of Pratt & Whitney SB PW4G-100-73-48, Revision No. 1, dated April 24, 2018.
Unsafe condition
This AD was prompted by several instances of fuel leaks on PW engines with the Talon IIB combustion chamber configuration installed. We are issuing this AD to prevent failure of the fuel nozzles. The unsafe condition, if not addressed, could result in engine fire and damage to the airplane.
Affected ADs
This AD replaces AD 2016-22-05, Amendment 39-18694 (81 FR 75686, November 1, 2016).
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