AD 98-04-33
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
Flight in severe icing conditions may result in ice build-up on protected surfaces exceeding the capability of the ice protection system, or may result in ice forming aft of the protected surfaces, which may not be shed using the ice protection systems and may seriously degrade the performance and controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the AFM Limitations Section to specify procedures prohibiting flight in severe icing conditions (determined by visual cues), prohibiting autopilot use when ice forms aft of protected surfaces or with unusual trim conditions, and requiring wing icing inspection lights to be operative at night. Revise the Normal Procedures Section to provide recognition cues for severe icing conditions and procedures for exiting, including requesting priority handling from Air Traffic Control, avoiding abrupt maneuvers, disengaging autopilot, flap usage restrictions, and reporting icing conditions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD (March 25, 1998).
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Affected Aircraft
Gulfstream American (Frakes Aviation) Model G-73 (Mallard) and G-73T series airplanes.
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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