AD 90-15-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Short Brothers PLC | SD3-60 | Airworthiness Directives; Model SD3-60 Series Airplanes |
Unsafe Condition
Electrical arcing or burnt wires in electrical panels 1C, 2C, 2D, and 6D could lead to an electrical fire and subsequent loss of essential equipment and/or flight instruments.
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Required Actions
Within 10 days after the effective date, inspect panels 1C, 2C, 2D, and 6D for wiring/terminals compliance with AC 43.13-1A. If arcing/burnt wires exist, replace defective wires and terminals before further flight. Also, within 10 days, either modify the air conditioning system per AAR Oklahoma Service Information Letter 5-90-1 and revise the AFM with Revision A, or deactivate the system by removing specific wires, capping them, and securing circuit breakers. Alternate compliance may be approved by the FAA Manager, Airplane Certification Office.
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Compliance Time
Within 10 days after the effective date of this AD, unless approved otherwise
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Affected Aircraft
Short Brothers PLC Model SD3-60 series airplanes equipped with AAR Oklahoma, Inc. freon air conditioning system under STC SA3749SW
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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