AD 73-12-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 744 | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model 744, 745D, and 810 Series Airplanes |
Unsafe Condition
Failures of the nacelle structure tubes and end fittings on high time engine nacelle structures due to fatigue and corrosion.
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Required Actions
Inspect engine nacelle structure tubes and end fittings for cracks using specified methods and PTLs. Inspect tubes for internal corrosion using radiographic method. Replace cracked or over-limit corroded parts before further flight.
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Compliance Time
Within the next 500 landings or 12 calendar months, whichever occurs sooner, after the effective date of this AD, and thereafter at intervals not to exceed 7,500 landings from the last inspection. Additional compliance timelines apply based on landing counts and prior inspections.
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Affected Aircraft
Vickers-Armstrongs (Aircraft Limited) Viscount Model 744, 745D, and 810 Series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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