AD 57-14-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 744 | Airworthiness Directives; VICKERS Model 700 Series Aircraft |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; VICKERS Model 700 Series Aircraft |
Unsafe Condition
Excessive end float of the flap torque shaft between the flap gearbox and No. 1 flap unit port and starboard can cause asymmetric flaps during operation.
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Required Actions
Inspect the engagement of trunnion blocks within the universal joint body of the torque tube during next daily inspection. Depending on protrusion measurement, either continue flying with corrective action within 300 flight hours or perform corrective action within 25 flight hours or prior to further flight. Corrective action involves setting the torque shaft with trunnion blocks flush and installing a tubular fiber or fluon distance piece with specified dimensions.
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Compliance Time
Compliance required as indicated. Corrective action must be taken within 300 flight hours, 25 flight hours, or prior to further flight depending on the protrusion measurement.
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Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount 700 Series Aircraft (Viscount 744, Viscount 745D), all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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