AD 98-21-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-30 | Airworthiness Directives; Short Brothers Model SD3-30, SD3-60, SD3-60 SHERPA, and SD3 SHERPA Series Airplanes |
| aircraft | Short Brothers PLC | SD3-60 | Airworthiness Directives; Short Brothers Model SD3-30, SD3-60, SD3-60 SHERPA, and SD3 SHERPA Series Airplanes |
| aircraft | Short Brothers PLC | SD3-60 SHERPA | Airworthiness Directives; Short Brothers Model SD3-30, SD3-60, SD3-60 SHERPA, and SD3 SHERPA Series Airplanes |
| aircraft | Short Brothers PLC | SD3-SHERPA | Airworthiness Directives; Short Brothers Model SD3-30, SD3-60, SD3-60 SHERPA, and SD3 SHERPA Series Airplanes |
Unsafe Condition
Failure of the levers and bracket assembly could result in uncommanded retraction of the inner flap assembly and consequent reduced controllability of the airplane.
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Required Actions
Perform a visual inspection of the levers and bracket assembly of the inner flap sub-assembly within 90 days after the effective date. If discrepancies are found, rework or replace parts as specified and repeat inspections at intervals not to exceed 1,200 flight hours or 6 months. If no discrepancies, repeat inspections every 4,800 flight hours or 24 months, whichever comes first.
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Compliance Time
Within 90 days after the effective date of this AD
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Affected Aircraft
Short Brothers PLC Model SD3-30, SD3-60, SD3-60 SHERPA, and SD3 SHERPA 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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