AD 99-19-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sabreliner Corporation | NA-265-40 | Airworthiness Directives; Sabreliner Model NA-265-40, NA-265-60, NA-70, and, NA-265-80 Series Airplanes |
| aircraft | Sabreliner Corporation | NA-265-60 | Airworthiness Directives; Sabreliner Model NA-265-40, NA-265-60, NA-70, and, NA-265-80 Series Airplanes |
| aircraft | Sabreliner Corporation | NA-265-70 | Airworthiness Directives; Sabreliner Model NA-265-40, NA-265-60, NA-70, and, NA-265-80 Series Airplanes |
| aircraft | Sabreliner Corporation | NA-265-80 | Airworthiness Directives; Sabreliner Model NA-265-40, NA-265-60, NA-70, and, NA-265-80 Series Airplanes |
Unsafe Condition
Reduced controllability due to adverse aerodynamic effects of ice adhering to the airplane prior to the first deicing cycle when pneumatic deicing boots are not activated at the first signs of ice accumulation.
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Required Actions
Revise the Airplane Flight Manual (AFM) Limitations Section to require activation of the airframe pneumatic deicing boots at the first signs of ice accumulation or upon ice detector annunciation. Include procedures for periodic cycling of the boots to minimize ice accretion.
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Compliance Time
Before further flight
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Affected Aircraft
Sabreliner Corporation models NA-265-40, NA-265-60, NA-70, and NA-265-80 series airplanes equipped with airframe pneumatic deicing boots.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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