AD 96-21-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-60 SHERPA | Airworthiness Directives; Short Brothers Model SD3-60 SHERPA Series Airplanes |
Unsafe Condition
Severe icing conditions outside of certification may result in ice buildup exceeding ice protection system capability or forming aft of protected surfaces, degrading performance and controllability.
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Required Actions
Revise the Airplane Flight Manual (AFM) to include warning and procedures for severe icing conditions, including visual cues, autopilot restrictions, and equipment requirements. Operators must notify flight crews of these changes.
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Compliance Time
Within 30 days after the effective date of this AD
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Affected Aircraft
Short Brothers Model SD3-60 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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