AD 2021-10-06
Effective 05/10/2021 · Published 05/04/2021
Airworthiness Directives; CFM International, S.A. Turbofan Engines
Summary
The FAA is adopting a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) LEAP-1B model turbofan engines. This AD was prompted by multiple reports of pressure sub-system (PSS) unit faults due to pressure transducer corrosion following extended storage periods. For an engine in service, this AD requires checks for engine maintenance messages related to the pressure transducer and, depending on…