AD 2000-04-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McDonnell Douglas | Models DC-3 and DC-4 | Airworthiness Directives; McDonnell Douglas Models DC-3 and DC-4 Series Airplanes |
Unsafe Condition
Failure to activate airframe pneumatic deicing boots in icing conditions can lead to ice accumulation, resulting in reduced controllability due to adverse aerodynamic effects.
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Required Actions
Inspect to determine the type of airframe pneumatic deicing boots installed. Revise the Airplane Flight Manual (AFM) to include requirements for activation of the pneumatic deicing boots for airplanes equipped with 'modern' boots.
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Compliance Time
Before further flight
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Affected Aircraft
McDonnell Douglas Models DC-3 and DC-4 series airplanes equipped with airframe pneumatic deicing boots.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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