AD 2021-10-20
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) could result in loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revising the existing aircraft flight manual (AFM) to update a systems limitation for the transformer rectifier unit (TRU), performing an operational test of a certain contactor and an electrical test of a certain battery toggle switch, and corrective actions if necessary, as specified in EASA Emergency AD 2021-0120-E.
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Compliance Time
Before further flight
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Affected Aircraft
ATR--GIE Avions de Transport R[eacute]gional Model ATR42-500 and ATR72-212A airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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