AD 70-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 744 | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744 and 745D Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744 and 745D Airplanes |
Unsafe Condition
Failure of the automatic feathering system's micro-switch actuating levers could lead to improper arming during cruise, turbine overheat, or propeller separation from the engine due to engine annulus gear failure.
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Required Actions
Replace micro-switch actuating levers and set the 'arm' setting of the automatic feathering system throttle micro-switches per British Aircraft Corporation Bulletin D.2207, 4th Issue (Jan 31, 1969) or later ARB/FAA-approved equivalent.
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Compliance Time
within the next 450 hours' time in service after the effective date of this AD
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Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount 744 and Viscount 745D airplanes
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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