AD 57-26-02
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
The flap idler sprocket retaining nut (P/N 60903-39 and 60903-1151) may become unscrewed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a screwed collar (P/N 70103-4227) and a split pin (P/N SP9E10) to improve the locking means for the sprocket shaft nuts at Nos. 1, 2, and 3 flap units.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than July 1, 1958
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount 744 and Viscount 745D models, all serial numbers
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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