In the NPRM [FAA–2012–0060; 2012–NE–02–AD], para.2.(e).(1).(v); it is requested to check LPT stg 4 vanes at next LPT overhaul for casting identification. Our question is; since the SB PW4G-100-72-221 refers for the same inspection and some of our engines have already been checked by the SB, we request FAA to put the SB reference into the AD as alternate method of compliance for subject paragraph only.
Thanks and best regards,
Yalcin CELIK
Onur Air
This is comment on Proposed Rule
Airworthiness Directives: Pratt&Whitney (PW) Division Turbofan Engines
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