AD 91-14-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 744 | Airworthiness Directives; BRITISH AEROSPACE Viscount Model 744, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 745D | Airworthiness Directives; BRITISH AEROSPACE Viscount Model 744, 745D, and 810 Series Airplanes |
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; BRITISH AEROSPACE Viscount Model 744, 745D, and 810 Series Airplanes |
Unsafe Condition
Reduced structural integrity of the wings due to corrosion along the total length of the top surface of the left and right wing spar upper boom.
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Required Actions
Within 180 days after the effective date, and every 180 days thereafter, perform an eddy current inspection for corrosion using specified PTL documents. If corrosion is found, repair prior to further flight per the same documents or approved method. Alternative compliance may be approved by the FAA.
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Compliance Time
Within 180 days after the effective date of this AD, and thereafter at intervals not to exceed 180 days
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Affected Aircraft
All Viscount Model 744, 745D, and 810 series airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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