AD 76-18-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 24 | Airworthiness Directives; Gates Learjet Models 24, 25, 35 and 36 Airplanes |
| aircraft | Learjet Inc. | 25 | Airworthiness Directives; Gates Learjet Models 24, 25, 35 and 36 Airplanes |
| aircraft | Learjet Inc. | 35 | Airworthiness Directives; Gates Learjet Models 24, 25, 35 and 36 Airplanes |
| aircraft | Learjet Inc. | 36 | Airworthiness Directives; Gates Learjet Models 24, 25, 35 and 36 Airplanes |
Unsafe Condition
Incorrect connection of the inverter input power wiring to the wrong power bus could result in electrical system malfunction.
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Required Actions
Perform an inverter operational check per Gates Learjet Service Bulletins SB 24/25-273 or SB 35/36-24-3. If the electrical system does not operate correctly, rewire the inverter input power wiring per applicable manufacturer's Service Manual Wiring Diagram and repeat the operational check. Equivalent methods must be approved by the FAA.
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Compliance Time
within the next 25 hours' time in service after the effective date of this AD
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Affected Aircraft
Gates Learjet Models 24 (Serial Numbers 24-230 thru 24-331 and 24-333); 25 (Serial Numbers 25-061 and 25-067 thru 25-207); 35 (Serial Numbers 35-001 thru 35-079); and 36 (Serial Numbers 36-001 thru 36-020)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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