AD 92-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-200 | Airworthiness Directives; AEROSPATIALE Model ATR42 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-300 | Airworthiness Directives; AEROSPATIALE Model ATR42 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-320 | Airworthiness Directives; AEROSPATIALE Model ATR42 Series Airplanes |
| aircraft | ATR - GIE Avions de Transport R gional | ATR42-500 | Airworthiness Directives; AEROSPATIALE Model ATR42 Series Airplanes |
Unsafe Condition
The potential hazards associated with operating in icing conditions including freezing rain, which may result in asymmetric wing lift, increased aileron forces, and loss of control due to ice accretion.
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Required Actions
Incorporate a statement into the AFM Limitations Section prohibiting autopilot use in icing conditions or freezing rain. Install vortex generators per Service Bulletin ATR42-57-0018, Revision 1. Allow operation with one missing vortex generator per wing if symmetrical.
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Compliance Time
Within 10 hours time-in-service after May 3, 1989 for AFM changes; within 60 days after December 15, 1989 for vortex generator installation.
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Affected Aircraft
AEROSPATIALE Model ATR42-200, ATR42-300, ATR42-320, ATR42-500 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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