AD 97-04-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | Jetstream Model 4101 | Airworthiness Directives; Jetstream Model 4101 Airplanes |
Unsafe Condition
Separation of the motor housing from the elevator trim servo due to inadequate locking of screws installed during assembly, which could release motor gearbox components and jam the elevator controls, resulting in reduced pitch control.
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Required Actions
Conduct a one-time inspection of airplane records or visual inspection of the servo to determine modification status. For servos not at Modification B or greater, inspect records to determine serial number, perform repetitive visual and tactile inspections for motor housing looseness, and replace servos as necessary. Replace specified elevator trim servos with serviceable assemblies.
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Compliance Time
Effective March 6, 1997. Actions required in accordance with the referenced Alert Service Bulletin J41-A22-008, Revision 1.
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Affected Aircraft
BAE Systems (Operations) Limited Model 4101 airplanes with serial numbers 41004 through 41090 inclusive.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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