AD 2016-02-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International S | Airworthiness Directives; CFM International S.A. Turbofan Engines |
Unsafe Condition
Failure of the turbine rear frame (TRF) on the low-pressure turbine (LPT) frame assembly, which could lead to engine separation, damage to the engine, and damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initial and repetitive inspections of certain part number (P/N) turbine rear frames (TRFs) on the low-pressure turbine (LPT) frame assembly are required. The inspections involve eddy current inspection (ECI) or fluorescent penetrant inspection (FPI) of the TRF mount struts, with specific compliance intervals based on crack lengths found during inspections. Replacement of the TRF is required if the cumulative crack length at any TRF mount strut location is 0.25 inches or greater.
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Compliance Time
Within 150 cycles after the effective date of the AD or prior to accumulating specific cycle thresholds, depending on whether CFM Service Bulletin (SB) No. CFM56-5B S/B 72-0308 has been applied.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
CFM International S.A. CFM56-5B engines with turbine rear frame (TRF), part number (P/N) 338-102-907-0 or P/N 338-102-908-0, installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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