AD 93-18-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | Jetstream Model 4101 | Airworthiness Directives; Jetstream Aircraft Limited Model 4101 Series Airplanes |
Unsafe Condition
The unsafe condition could occur if the horizontal stabilizer trim actuator assembly, including the trim actuator, trim control unit, and trim control cable, becomes inoperative due to a failure of the trim actuator or trim control unit, or a jamming of the trim control cable, which could result in reduced controllability of the airplane.
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Required Actions
Conduct an inspection of the horizontal stabilizer trim actuator assembly, including the trim actuator, trim control unit, and trim control cable. Perform the actions specified in the approved Boeing Service Bulletin 747-400-23022, which may include replacing the trim actuator, trim control unit, or trim control cable, and modifying the airplane's wiring and components as necessary.
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Compliance Time
Before the next flight.
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Affected Aircraft
Jetstream Aircraft Limited Model 4101 series airplanes, excluding those modified in accordance with Supplemental Type Certificate (STC) number ST02575NA.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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