AD 91-11-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Vickers-Armstrongs (Aircraft Limited) | Viscount 810 | Airworthiness Directives; British Aerospace Viscount Model 810 Series Airplanes |
Unsafe Condition
In-flight separation of an entrance or emergency door from the airplane and subsequent decompression of the passenger cabin due to incorrectly machined door operating torque shaft coupling sleeves.
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Required Actions
Within 90 days after the effective date, perform a non-destructive testing (NDT) X-ray inspection of the forward passenger door and rear entrance and emergency doors for incorrectly machined sleeves. If sleeves are found incorrect, replace them with correctly machined parts before further flight.
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Compliance Time
Within 90 days after the effective date of this AD
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Affected Aircraft
All Viscount Model 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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