AD Amdt-39-10523
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | CFM | International CFM56-3 | Airworthiness Directives; CFM International CFM56-3, -3B, -3C, - 5, -5B, and -5C Series Turbofan Engines |
Unsafe Condition
Failure of the transfer gearbox (TGB) output bevel gear, AGB intermediate gear assembly, or AGB gearshaft cluster spur assembly due to material defects or fatigue.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the affected AGB starter gearshaft, TGB input/output bevel gears, and AGB gearshaft cluster spur assemblies. Perform daily checks of the AGB/TGB magnetic chip detector. Ensure engines are not operated unless equipped with serviceable components or replaced with serviceable engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
CFM International CFM56-3, -3B, -3C, -5, -5B, and -5C series turbofan engines with specific accessory gearbox (AGB) starter gearshafts, TGB input bevel gears, TGB output bevel gears, AGB intermediate gear assemblies, or AGB gearshaft cluster spur assemblies.
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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