AD 88-07-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-C30 | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION Model 250-C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-C30M | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION Model 250-C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-C30P | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION Model 250-C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-C30R (T703-AD-700) | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION Model 250-C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-C30S | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION Model 250-C30 Series Engines |
Unsafe Condition
Cracks of the Gas Producer Support Pressure Oil Tube Assembly (P/N 23037410 or 6892825) could progress to loss of engine oil, causing an in-flight shutdown.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Daily post-flight checks for oil leaks until compliance with replacement actions. Replace P/N 23037410 with P/N 23038235 by April 15, 1988. Replace P/N 6892825 with P/N 23035275 and 23038235 by July 1, 1988.
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Compliance Time
Not later than April 15, 1988 (for P/N 23037410 replacement) and July 1, 1988 (for P/N 6892825 replacement).
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Affected Aircraft
Allison Model 250-C30 series engines with turbine serial numbers CAT 90001-90683, 95001-95600, 97501-97550 and AT 19001-19140, excluding those with Part II/III of CEB-A-72-3165 or equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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