AD 72-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10 | ROLLS-ROYCE Models Dart 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10J | ROLLS-ROYCE Models Dart 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10K | ROLLS-ROYCE Models Dart 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-4 | ROLLS-ROYCE Models Dart 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-4K | ROLLS-ROYCE Models Dart 542-4, -4K, -10, -10J, and -10K Engines |
Unsafe Condition
Fatigue failure of first stage (low pressure) impellers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace first stage (low pressure) impellers with ones having less than 11,000 flights or incorporate Rolls Royce Dart Modification 1455. Subsequent compliance required before 11,000 flights on the impeller or since modification.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 flights after the effective date of this AD or before the accumulation of 11,000 flights on that impeller, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce Deutschland Ltd & Co KG Dart 542-4, -4K, -10, -10J, and -10K engines installed on Convair Model 340/440 (Convair 600/640) and NAMC YS-11 airplanes.
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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