AD 68-17-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Deutschland Ltd & Co KG | Spey 506-14 | ROLLS-ROYCE Models 506-14, 510-14, 511-8, and 511-14 Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Spey 511-14 | ROLLS-ROYCE Models 506-14, 510-14, 511-8, and 511-14 Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Spey 511-8 | ROLLS-ROYCE Models 506-14, 510-14, 511-8, and 511-14 Engines |
Unsafe Condition
Possible failure of the high pressure (H.P.) center section air duct adjacent to welds, which may cause secondary powerplant damage.
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Required Actions
Within 300 hours time in service after the AD's effective date, visually inspect the high pressure air system center section duct (P/Ns EU.29670A and EU.63415A) for cracks near welds and install a stainless steel wire braid wrap per Rolls-Royce Service Bulletin SP. 75-86 or equivalent. Subsequent inspections at intervals not exceeding 1,000 hours' time in service must check for duct cracks and wire braid security, distortion, or discoloration. Replace defective ducts and wire wraps before further flight.
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Compliance Time
Within the next 300 hours time in service after the effective date of this AD
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Affected Aircraft
Rolls-Royce Spey 506-14, 510-14, 511-8, and 511-14 engines
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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