AD Amdt-39-11566

final rule
Data completeness: 70%

Airworthiness Directives; General Electric Aircraft Engines CF34 Series Turbofan Engines

AD Number
Amdt-39-11566
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 98-ANE-19-AD
FR Citation
65 FR 8039

Applicability

TypeManufacturerModelDetails
engine General Electric Aircraft Airworthiness Directives; General Electric Aircraft Engines CF34 Series Turbofan Engines

Unsafe Condition

Failure of Buna-N O-rings due to degradation, potential overspeed conditions without improved MFC protection, or inadequate venting leading to engine performance issues.

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

Required Actions

Replace Buna-N O-rings with Viton O-rings, revise the vent groove location on the MFC mounting flange, or install an MFC with improved overspeed protection.

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

Affected Aircraft

General Electric Aircraft Engines CF34 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.

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