AD 80-14-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 501-D13 | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13A | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13D | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13E | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13H | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, and 501-D13H Engines |
Unsafe Condition
Disc failures due to fatigue in the 1st stage turbine wheels with part numbers 6844061 and 6847111.
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Required Actions
Remove turbine wheels from service based on spline fit interference and cycle limits. Operators must obtain spline fit data from the overhauler and comply with removal schedules specified for their wheel's cycle count and spline fit category.
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Compliance Time
Within the specified cycle limits based on spline fit and cycle count as of the effective date (July 10, 1980).
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Affected Aircraft
Rolls-Royce Corporation Model 501-D13, 501-D13A, 501-D13D, 501-D13E, and 501-D13H engines equipped with 1st stage turbine wheels part numbers 6844061 and 6847111.
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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