AD 2004-13-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short | Brothers Model SD3-60 SHERPA Series | Airworthiness Directives; Short Brothers Model SD3-60 SHERPA Series Airplanes |
Unsafe Condition
Loose bolts that attach the vertical stabilizer to the horizontal stabilizer, and pulled or loose rivets in the upper shear angles, which could result in reduced structural integrity of the vertical stabilizer.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform a detailed inspection, including a torque test, to detect discrepancies in the bolts or bolt holes that attach the vertical stabilizer to the horizontal stabilizer, and to detect loose or pulled rivets in the upper shear angles. Repeat the detailed inspection and torque test at intervals not to exceed 1,500 flight hours. If any discrepancy is found, perform related investigative and corrective actions before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 2 months after the effective date of this AD, or prior to the accumulation of 1,500 total flight hours, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Short Brothers Model SD3-60 SHERPA series airplanes, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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