AD 96-26-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CT7-5A2 | Airworthiness Directives; General Electric Aircraft Engines CT7 Series Turboprop Engines |
| engine | General Electric Company | CT7-7A | Airworthiness Directives; General Electric Aircraft Engines CT7 Series Turboprop Engines |
| engine | General Electric Company | CT7-9B | Airworthiness Directives; General Electric Aircraft Engines CT7 Series Turboprop Engines |
| engine | General Electric Company | CT7-9C | Airworthiness Directives; General Electric Aircraft Engines CT7 Series Turboprop Engines |
Unsafe Condition
Gas generator turbine stage 2 forward cooling plate failure, which could result in an uncontained engine failure.
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Required Actions
Replace gas generator turbine stage 2 forward cooling plates prior to reaching new reduced cyclic life limits specified in GE SB A72-381. Establish new cyclic life limits of 8,000 cycles since new (CSN) for P/N 6064T10P01 with specific serial numbers, 12,000 CSN for P/N 6064T10P01 and 5086T91P02 on CT7-5A2/-7A engines, and 9,000 CSN for P/N 6064T10P01 and 5086T91P02 on CT7-9B/-9C engines.
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Compliance Time
Within 30 days after the effective date of this AD, or prior to reaching the new, reduced cyclic life limits listed in GE SB A72-381, whichever occurs later.
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Affected Aircraft
General Electric Aircraft Engines CT7-5A2, -7A, -9B, and -9C turboprop engines with gas generator turbine stage 2 forward cooling plates P/N 6064T10P01 and P/N 5086T91P02 installed.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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