AD 88-17-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-B17 | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17B | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17C | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17D | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17E | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17F | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17F/1 | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17F/2 | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-C20 | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
| engine | Rolls-Royce Corporation | 250-C20B | ALLISON GAS TURBINE DIVISION, GENERAL MOTORS CORPORATION (ALLISON) Model 250-B17, -C20, -C20R, and -C30 Series Engines |
Unsafe Condition
The unsafe condition involves possible engine over-temperature, loss of throttle response, or unscheduled power increase due to certain Bendix gas producer fuel controls with specific part and serial numbers.
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Required Actions
Remove from service the affected Bendix gas producer fuel controls listed by part number and serial number in the appendix, replace with serviceable parts, and incorporate Allison Alert Commercial Engine Bulletins as specified. Ferrying is allowed under FAR 21.197 and 21.199.
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Compliance Time
within the next ten (10) operating hours after the effective date of this AD
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Affected Aircraft
Allison Model 250-B17, -C20, -C20R, and -C30 series engines with Bendix gas producer fuel controls listed in the appendix by part number and serial number.
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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