AD Amdt-39-10801
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Twin | Commander | Airworthiness Directives; Twin Commander Aircraft Corporation Models 500, 500-A, 500-B, 500-S, 500-U, 520, 560, 560-A, 560-E, 560-F, 680, 680-E, 680FL(P), 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695, 695A, 695B, and 720 Airplanes |
Unsafe Condition
Operating in severe icing conditions without clear procedures and limitations may lead to reduced aircraft control and potential structural failure due to ice accumulation.
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Required Actions
Revise the FAA-approved Airplane Flight Manual (AFM) to include procedures prohibiting flight in severe icing conditions based on 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
Before further flight
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Affected Aircraft
Twin Commander Aircraft Corporation Models 500, 500-A, 500-B, 500-S, 500-U, 520, 560, 560-A, 560-E, 560-F, 680, 680-E, 680FL(P), 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695, 695A, 695B, and 720 airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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