AD 83-07-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SC-7 Skyvan Series 3 | Airworthiness Directives; Short Model SC-7 Series 3 Series Airplanes |
Unsafe Condition
The cargo door locking pin microswitch assembly may have an adjusting screw installed on the microswitch operating lever, which could cause unwanted inflight opening of the cargo door.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Examine the cargo door locking pin microswitch assembly per Shorts Service Bulletin No. 52-65. Remove the adjusting screw from the microswitch operating lever if found. Adjust the locking pin operating rod and microswitch to ensure proper configuration as shown in Figure 5 of the Service Bulletin. Check door operation per Step 14 of the Service Bulletin.
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Compliance Time
within the next 100 hours time-in-service after the effective date of this AD
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Affected Aircraft
Short Brothers PLC SC-7 Skyvan Series 3 airplanes with a one-piece, 'flip-type,' cargo door installed, including specific serial numbers: SH1855, SH1860, SH1866 through SH1868, SH1875 through SH1880, SH1887 through SH1891, SH1894 through SH1900, SH1902, SH1904 through SH1906, SH1909 through SH1917, SH1919 through SH1924, SH1928 through SH1929, and SH1931 and on.
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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