Business · 04/05/2010

FAA Supersedes Airworthiness Directive for CFM56-5B Series Turbofan Engines

The Federal Aviation Administration (FAA) is revising an existing airworthiness directive (AD) for CFM International, S.A. CFM56-5B series turbofan engines, reducing the number of affected models, lowering the EGT margin threshold from 80°C to 75°C, and removing older FADEC software versions as a mandatory terminating action for continuous EGT margin deterioration monitoring.