AD 78-24-01 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 506 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 510 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 511 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 514 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 514-7 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 525 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 525F | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 526 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 527 | ROLLS-ROYCE LIMITED Model DART Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 528-7E | ROLLS-ROYCE LIMITED Model DART Engines |
Unsafe Condition
Control box mounting bolt failure causing restricted movement of the engine power lever or the high pressure fuel shut-off valve control lever.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the engine control box mounting bolts for integrity within 100 hours engine time in service or one month after the effective date, whichever comes first. If a detached or missing bolt head is found, replace both bolts with new ones per Service Bulletin or install revised bolts per Service Bulletin Da 76-16. Continue inspections every 400 hours engine time or 4 months unless bolts per Da 76-16 are installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours engine time in service or one month after the effective date of this AD, whichever occurs first
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce DART engines (models 506, 510, 511, 514, 514-7, 525, 525F, 526, 527, 528, 529, 530, 532, 542) with Modification 1525 incorporated, installed on various airplanes including Vickers Viscount, Fairchild F-27/FH-227, Fokker F-27, Armstrong Whitworth AW-650, Handley Page Herald, Hawker Siddeley 748, General Dynamics Models 240/340/440/600/640 with specific STCs, and Nihon YS-11/YS-11A.
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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