AD 2007-17-21
Effective 09/28/2007 · Published 08/24/2007
Airworthiness Directives; Pratt & Whitney (PW) JT9D-7R4 Series Turbofan Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for PW JT9D-7R4 series turbofan engines. This AD requires removing reduced cooling flow 2nd stage high pressure turbine (HPT) vane assemblies, part numbers (P/Ns) 797282, 796972, 800082, 800072, 803182, 803282, and 822582, installed in 2nd stage HPT vane cluster assemblies P/Ns 797592, 797372, 799872, 799782, and 822572. It also requires a visual and a fluoresce…