AD 96-21-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-30 | Airworthiness Directives; Shorts Model SD3-30, -60, and -SHERPA Series Airplanes |
| aircraft | Short Brothers PLC | SD3-60 | Airworthiness Directives; Shorts Model SD3-30, -60, and -SHERPA Series Airplanes |
| aircraft | Short Brothers PLC | SD3-60 SHERPA | Airworthiness Directives; Shorts Model SD3-30, -60, and -SHERPA Series Airplanes |
| aircraft | Short Brothers PLC | SD3-SHERPA | Airworthiness Directives; Shorts Model SD3-30, -60, and -SHERPA Series Airplanes |
Unsafe Condition
Exfoliation corrosion on the brackets of the flap hydraulic units could result in reduced structural integrity, leading to loss of flap control and reduced controllability of the airplane.
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Required Actions
Perform a visual inspection for exfoliation corrosion on the brackets of the flap hydraulic units using specified service bulletins. If corrosion is within limits, rework the area and adjust inspection intervals; if outside limits, replace the bracket. Repeat inspections at intervals per model: 2,400 hours/12 months (SD3-30/60) or 12 months (SD3-SHERPA).
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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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