Superseded. This AD was superseded by AD 2018-10-11. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2018-09-10
Effective 05/14/2018 · Published 05/02/2018
Airworthiness Directives; CFM International S.A. Turbofan Engines
Summary
We are adopting a new airworthiness directive (AD) for all CFM International S.A. (CFM) Model CFM56-7B engines. This AD requires initial and repetitive inspections of the concave and convex sides of the fan blade dovetail to detect cracking and replacement of any blades found cracked. This AD was prompted by a recent engine failure due to a fractured fan blade, that resulted in the engine inlet cowl disintegrating a…