AD 82-24-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-B15A | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B15E | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B15G | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17 | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17B | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17C | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17D | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17E | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17F | DETROIT DIESEL ALLISON Model 250 Series Engines |
| engine | Rolls-Royce Corporation | 250-B17F/1 | DETROIT DIESEL ALLISON Model 250 Series Engines |
Unsafe Condition
Failure of P/N 2526146 bushing assemblies with a nylon ball bearing separator installed in Bendix fuel control assemblies and power turbine governor assemblies can cause engine power loss, autoacceleration, overspeeding, or power turbine governor instability/malfunctioning.
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Required Actions
Inspect affected Bendix fuel control assemblies and power turbine governor assemblies within specified time-in-service intervals or before October 16, 1983, whichever comes first. Replace any bushing assembly with a nylon ball bearing separator with a steel one. Reidentify serviceable assemblies after inspection.
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Compliance Time
Before further flight for assemblies exhibiting symptoms; inspect within specified time-in-service intervals (based on engine model and time since new/overhaul) or before October 16, 1983, whichever occurs first.
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Affected Aircraft
Rolls-Royce Corporation Model 250 series engines equipped with Bendix fuel control assemblies and power turbine governor assemblies containing or suspected of containing P/N 2526146 bushing assemblies with a nylon ball bearing separator, excluding those with 'K' marking, specific serial ranges listed in the appendix, or pre-November 7, 1979 units not overhauled since.
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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