AD 2018-09-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International S | Airworthiness Directives; CFM International S.A. Turbofan Engines |
Unsafe Condition
a fractured fan blade, which resulted in the engine inlet cowl disintegrating and debris penetrating the fuselage, causing a loss of pressurization, and prompting an emergency descent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
a one-time ultrasonic inspection (USI) of the concave and convex sides of the fan blade dovetail.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 20 days
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
CFM International S.A. CFM56-7B model engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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