Airworthiness directives › 2012-18-03
AD 2012-18-03 Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
Applicability*9
This AD applies to the following Pratt & Whitney Division turbofan engines: (1) PW4000-94″ engine models PW4050, PW4052, PW4056, PW4152, PW4156, PW4650, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4156A, PW4158, PW4160, PW4460, and PW4462, including models with any dash-number suffix, with a 1st stage high-pressure turbine (HPT) seal support, part number (P/N) 55K601 (contained within assembly P/N 55K602-01) or P/N 50K532 (contained within assembly P/N 50K530-01), installed. (2) PW4000-100″ engine models PW4164, PW4164C, PW4164C/B, PW4168, and PW4168A with a 1st stage HPT seal support, P/N 55K601 (contained within assembly P/N 55K602-01) or P/N 50K532 (contained within assembly P/N 50K530-01), installed.
Compliance
For the purpose of this AD, a serviceable 1st stage HPT seal support is one that has a P/N that is not listed in this AD.
Required actions
The Manager, Engine Certification Office, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request.
Unsafe condition
Comply with this AD the next time the HPT module is removed from the engine, unless already done. (1) Remove the 1st stage HPT seal support, P/N 55K601 (contained within assembly P/N 55K602-01) or P/N 50K532 (contained within assembly P/N 50K530-01), from service and replace it with a serviceable 1st stage HPT seal support. (2) Remove the 1st stage HPT air seal ring, P/N 50L664, from the engine and fluorescent-penetrant-inspect, or eddy current-inspect, it for cracks. If found cracked, remove the 1st stage HPT air seal ring from service.
Affected ADs
None.
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