AD 83-14-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SC-7 Skyvan Series 3 | Airworthiness Directives; Short Model SC7 Skyvan Series 3 Series Airplanes |
Unsafe Condition
Failure of the flaps due to potential structural failure of the flap attach mechanisms, including the outer hinge arm, operating arm attachment ribs, and associated components.
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Required Actions
Inspect the inboard flap outer hinge arm and operating arm attachment ribs, replace the outer hinge arm per Service Bulletin 57-A61, Rev. 5. Modify outboard flap attachment ribs per Service Bulletin 57-62, Rev. 1. Replace specific flap components at 20,000 or 18,000 flights as per Service Bulletin 51-51. Use flight hours multiplied by 2 to determine flight counts if approved.
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Compliance Time
Within the next 50 flights after August 19, 1983, or upon accumulating 7,000 flights, whichever occurs later, and thereafter every 7,000 flights. For some modifications, within the next 250 flights after August 19, 1983, or upon accumulating 7,000 flights, whichever occurs later.
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Affected Aircraft
Short Brothers PLC SC-7 Skyvan Series 3 airplanes, all serial numbers except SH1845 and SH1883 for certain requirements, with specific requirements for S/Ns SH1845 and SH1883.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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