AD 81-03-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 501-D13 | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13A | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13D | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13E | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, 501-D13H Engines |
| engine | Rolls-Royce Corporation | 501-D13H | DETROIT DIESEL ALLISON Model 501-D13, 501-D13A, 501- D13D, 501-D13E, 501-D13H Engines |
Unsafe Condition
Catastrophic wheel failures could occur subsequent to the specified cyclic intervals due to insufficient spline interference fit between turbine wheels and shafts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine the spline fit of each turbine wheel stage (1-4) and remove wheels based on their respective cyclic limits (e.g., 24,000 cycles for Stage 1 with 0.0000-0.0009T fit). Replace wheels exceeding their cyclic or hourly life limits as specified in the AD table and CSL-120.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to accruing 100 additional cycles if exceeding the cyclic limits on the effective date (January 28, 1981).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce Corporation Model 501-D13, 501-D13A, 501-D13D, 501-D13E, 501-D13H engines equipped with specific turbine wheels (Part Numbers listed in the AD).
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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