AD 72-03-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Corporation | 250-B15A | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-B15E | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-B15G | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-B17 | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C10B (T63-A-5A) | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C10D (T63-A-700) | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18 | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18A | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18B | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
| engine | Rolls-Royce Corporation | 250-C18C | ALLISON Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19 and 250-C20 Engines |
Unsafe Condition
Second stage turbine wheels (P/Ns 6857912 and 6871872) may exceed their life limit margin due to excessive time in service, leading to potential failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service turbine wheels with over 1,500 hours' time in service within 50 hours after the AD's effective date. For wheels with 1,500 hours or less, remove before exceeding 1,550 hours' time in service. Actions must be accomplished unless already done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 hours' time in service after the effective date of this AD, and prior to exceeding specified time in service limits.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce Corporation engines: Models 250-B15A, 250-B15E, 250-B15G, 250-B17, 250-C10B, 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19, and 250-C20 with second stage turbine wheels P/Ns 6857912 and 6871872.
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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