AD 2023-19-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes |
Unsafe Condition
Temporary loss of all display units and the integrated electronic standby instrument (IESI), which could result in loss of control of the airplane.
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Required Actions
Modifying the battery toggle switch wiring and replacing the battery toggle switch, and revising the existing aircraft flight manual (AFM) to update a systems limitation for the transformer rectifier unit (TRU), limiting dispatch with certain equipment inoperative, performing an operational test of the contactor FIN 1PA for discrepancies, and performing corrective actions if necessary.
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Compliance Time
Before further flight
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Affected Aircraft
ATR-GIE Avions de Transport Régional Model ATR42-500, ATR72-212A, ATR72-101, -102, -201, -202, -211, and -212 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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