AD 99-19-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Frakes Aviation | G-73 | Airworthiness Directives; Gulfstream American (Frakes Aviation) Model G-73 (Mallard) and G-73T Series Airplanes |
Unsafe Condition
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 Airplane Flight Manual (AFM) to include requirements for activation of the airframe pneumatic deicing boots at the first signs of ice accumulation or upon annunciation from an ice detector system. Periodic cycling of the boots is also required.
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Compliance Time
Before further flight
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Affected Aircraft
Gulfstream American (Frakes Aviation) Model G-73 (Mallard) and G-73T series airplanes equipped with airframe pneumatic deicing boots.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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