Summary
We propose to adopt a new airworthiness directive (AD) for all Pratt & Whitney (PW) PW4164-1D, PW4168-1D, PW4168A-1D and PW4170 engines, and certain PW4164, PW4168, and PW4168A turbofan engines. This proposed AD was prompted by fuel nozzle-to-fuel supply manifold interface fuel leaks. This proposed AD would require inspecting fuel nozzles for signs of leakage, replacing hardware as required, and torqueing to specified requirement. We are proposing this AD to prevent fuel leaks which could result in engine fire and damage to the airplane.