AD Amdt-39-10758

final rule
Data completeness: 70%

Airworthiness Directives; CFM International CFM56-7B Series Turbofan Engines

AD Number
Amdt-39-10758
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. 98-ANE-50-AD
FR Citation
63 FR 49423

Applicability

TypeManufacturerModelDetails
engine CFM International CFM56-7B Series Airworthiness Directives; CFM International CFM56-7B Series Turbofan Engines

Unsafe Condition

Failure of the Accessory Gearbox (AGB)/Transfer Gearbox (TGB) starter gearshaft due to abnormal magnetic particles indicating pending failure.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Inspect the AGB/TGB Magnetic Chip Detector (MCD) for abnormal magnetic particles. Remove from service and replace suspect starter gearshafts with serviceable parts.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

CFM International CFM56-7B series turbofan engines

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

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.