AD 77-20-05 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 506 | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 510 | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 511 | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 511-7E | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 514 | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 514-7 | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 526 | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 528-7E | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 528D-7E | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 529-7E | ROLLS-ROYCE LIMITED Models DART Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532 Engine Series |
Unsafe Condition
Failure of the fuel burner feed and manifold pipes could result in fuel leakage and a fire.
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Required Actions
Inspect fuel burner feed and manifold pipes for specific part numbers and manufacturing criteria. If pipes meet the criteria, inspect for corroded, cracked, or broken wires using 5X or 10X magnification per SB DA 73-73. Replace or rework pipes with issues; clean and identify serviceable pipes. Use FAA-approved equivalents where applicable.
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Compliance Time
Before returning the engine to service
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Affected Aircraft
Rolls-Royce DART engines series Mk. 506, 510, 511, 514, 526, 528, 529, 530, 532, installed on various aircraft models including BAC Viscount 744/745D, Fokker F-27 variants, Fairchild F-27 series, Fairchild-Hiller FH-227 variants, Armstrong Whitworth Argosy 650, Grumman G-159, and Hawker Siddeley HS-748 Series 2A.
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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