AD 75-22-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-6D | GENERAL ELECTRIC Models CF6-6D and CF6-6D1 Engines |
| engine | General Electric Company | CF6-6D1 | GENERAL ELECTRIC Models CF6-6D and CF6-6D1 Engines |
Unsafe Condition
Possible disintegration of the high pressure turbine thermal shield.
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Required Actions
Borescope inspect the high pressure turbine thermal shield within 400 operating cycles after the effective date and every 400 cycles thereafter, following General Electric Service Bulletin (CF6-6) 72-603 or FAA-approved revision. Exclusions apply for engines with shields replaced/modified per SB 72-442/72-502 or specific part/assembly numbers listed.
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Compliance Time
Within the next 400 operating cycles after the effective date of this Airworthiness Directive, unless already accomplished, and every 400 cycles thereafter
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Affected Aircraft
General Electric Models CF6-6D and CF6-6D1 Turbofan Engines
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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