AD 71-06-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 506 | ROLLS-ROYCE Models 506, 510, 511, 511-7E, 514, and 514-7 Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 510 | ROLLS-ROYCE Models 506, 510, 511, 511-7E, 514, and 514-7 Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 511 | ROLLS-ROYCE Models 506, 510, 511, 511-7E, 514, and 514-7 Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 511-7E | ROLLS-ROYCE Models 506, 510, 511, 511-7E, 514, and 514-7 Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 514 | ROLLS-ROYCE Models 506, 510, 511, 511-7E, 514, and 514-7 Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 514-7 | ROLLS-ROYCE Models 506, 510, 511, 511-7E, 514, and 514-7 Engines |
Unsafe Condition
Failure of the Rolls-Royce turbine disc retaining bolt P/N RK 33044 could result in engine failure.
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Required Actions
Replace turbine disc retaining bolt P/N RK 33044 with P/N RK 43376 in accordance with Rolls-Royce Service Bulletin Da 72-347, Rev 2 or later ARB/FAA-approved revision.
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Compliance Time
Within the next 4,000 hours' time in service after the effective date or at the next engine overhaul, whichever occurs first (for engines on airplanes with >3 hours/day utilization) or within the next 2,000 hours' time in service after the effective date or at the next engine overhaul, whichever occurs first (for engines on airplanes with ≤3 hours/day utilization).
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Affected Aircraft
Rolls-Royce models 506, 510, 511, 511-7E, 514, 514-7 engines installed on British Aircraft Corporation Viscount 744/745D, Fairchild F-27/F-27B, and Fokker F-27 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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