AD 2000-14-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper | Aircraft | Airworthiness Directives; The New Piper Aircraft, Inc. PA-42 Series Airplanes |
Unsafe Condition
Failure to activate pneumatic wing and tail deicing boots at the first signs of ice accumulation can lead to reduced controllability of the aircraft due to adverse aerodynamic effects of ice adhering to the airplane prior to the first deicing cycle.
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Required Actions
Revise the Limitations Section of the FAA-approved Airplane Flight Manual (AFM) to include requirements for activation of the ice protection systems. Activation must occur at the first sign of ice formation or upon annunciation from an ice detector system. The system must either be operated in the automatic cycling mode or manually cycled as needed to minimize ice accretions. Deactivation is only allowed after leaving known icing conditions and determining the airplane is clear of ice.
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Compliance Time
Within 10 calendar days after August 21, 2000
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Affected Aircraft
The New Piper Aircraft, Inc. PA-42, PA-42-720, PA-42-720R, and PA-42-1000 airplanes, all serial numbers, equipped with pneumatic deicing boots and certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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