AD 2012-14-09
Effective 11/07/2012 · Published 10/03/2012
Airworthiness Directives; Pratt & Whitney (P&W) Division Turbofan Engines
Summary
We are adopting a new airworthiness directive (AD) for certain P&W PW4000 series turbofan engines. This AD was prompted by reports of 3rd and 4th stage vane fractures in the low-pressure turbine (LPT) of certain PW4000-94" and PW4000-100" turbofan engines. This AD requires dimensional inspections of LPT 3rd stage vanes and the rear turbine case, inspection of LPT 4th stage vanes at the next LPT overhaul and removal…