AD 60-03-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; VICKERS Model 745D and 810 Aircraft |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; VICKERS Model 745D and 810 Aircraft |
Unsafe Condition
Failures of the main landing gear uplock lever, which prevent extension of the landing gear with the landing gear retracted, have resulted in wheels up landings. Investigation of these incidents disclosed that failures were caused by overloading of the uplock mechanism due to incorrect rigging.
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Required Actions
Within the next 50 flights and every 50 flights thereafter, conduct visual 'in situ' inspections of main landing gear uplock levers for cracks and loose rivets. Within the next 500 flights, verify uplock mechanism adjustment so the compression spring does not bottom during operation. Remove and inspect uplock levers for cracks, distortion, or misalignment when they reach specified flight limits (2,500 flights for new unreinforced levers, 2,000 flights after reinforcement, or 4,500 flights for pre-reinforced levers). Before August 1, 1961, install strengthened steel uplock lever, spring-loaded actuating rod, and hydraulic release per Vickers modification Bulletin D.2954 and FG.1745, Issue 2.
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Compliance Time
Compliance required as indicated.
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Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount 745D and 810 aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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