AD 84-17-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 24 | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24A | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24B | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24B-A | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24C | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24D | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24D-A | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24E | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24F | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
| aircraft | Learjet Inc. | 24F-A | Airworthiness Directives; Gates Learjet Model 24 Series Airplanes |
Unsafe Condition
Failure of the horizontal stabilizer trim actuator could result in loss of control of the airplane.
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Required Actions
Install the specified modification kits (AMK 82-5, AMK 82-1, AMK 81-18, or AMK 81-13 based on model) and verify AFM revisions as per Table II. Ensure modifications are performed by an FAA-certificated repair agency and record maintenance entries.
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Compliance Time
within eighteen (18) months after effective date unless previously accomplished or prior compliance with AD 81-16-08
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Affected Aircraft
Gates Learjet Model 24 series airplanes (24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A) certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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