AD 69-26-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-C18 | ALLISON Model 250-C18 Series Engines. |
| engine | Rolls-Royce Corporation | 250-C18A | ALLISON Model 250-C18 Series Engines. |
| engine | Rolls-Royce Corporation | 250-C18B | ALLISON Model 250-C18 Series Engines. |
| engine | Rolls-Royce Corporation | 250-C18C | ALLISON Model 250-C18 Series Engines. |
Unsafe Condition
Failure of the power and accessories gear box due to insufficient strength or fatigue.
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Required Actions
Modify the engine and power and accessories gear box in accordance with specified Allison Commercial Engine Bulletins or an equivalent method approved by the FAA. Compliance must be completed by October 1, 1971.
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Compliance Time
On or before October 1, 1971
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Affected Aircraft
Rolls-Royce Corporation Model 250-C18, 250-C18A, 250-C18B, 250-C18C engines.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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