AD 91-18-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-30 | Airworthiness Directives; Short Brothers, PLC Model SD3-30 and SD3-60 Series Airplanes |
| aircraft | Short Brothers PLC | SD3-60 | Airworthiness Directives; Short Brothers, PLC Model SD3-30 and SD3-60 Series Airplanes |
Unsafe Condition
Loss of power to the pitot/static heaters may result in incorrect airspeed and altitude information being provided to the pilot and/or co-pilot in the event of a generator or engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the power source for the pitot/static heaters in accordance with specified service bulletins and revise the Emergency and Normal Procedures Sections of the AFM by inserting designated amendment documents.
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Compliance Time
Within 180 days after the effective date of this AD
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Affected Aircraft
Short Brothers PLC Model SD3-30 series (Serial Numbers SH3002 through SH3072, SH3073 and subsequent) and SD3-60 series (Serial Numbers SH3601 through SH3619, SH3620 through SH3676, SH3677 through SH3762) airplanes, as listed in specified service bulletins.
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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