AD 98-04-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | HAFEI Aviation Industry Co. LTD (HAIC) | Y12 IV | Airworthiness Directives; Harbin Aircraft Manufacturing Corporation Model Y12 IV Airplanes |
Unsafe Condition
Operating in severe icing conditions outside the certification envelope may lead to potential hazards due to inadequate flight crew information on recognition and exit procedures.
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Required Actions
Revise the Airplane Flight Manual (AFM) Limitations Section to prohibit flight in severe icing conditions as determined by visual cues, limit or prohibit use of flight control devices in such conditions, and provide recognition cues and exit procedures for severe icing conditions.
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Compliance Time
Effective March 13, 1998.
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Affected Aircraft
Harbin Aircraft Manufacturing Corporation Model Y12 IV airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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