AD 93-24-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 55 | Airworthiness Directives; Learjet Model 55, 55B, and 55C Airplanes |
| aircraft | Learjet Inc. | 55B | Airworthiness Directives; Learjet Model 55, 55B, and 55C Airplanes |
| aircraft | Learjet Inc. | 55C | Airworthiness Directives; Learjet Model 55, 55B, and 55C Airplanes |
Unsafe Condition
The loss of both generators during flight due to wiring issues in the left- and right-hand generator interface boxes and between these boxes.
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Required Actions
Modify the wiring inside the left- and right-hand generator interface boxes and between these boxes, perform an operational test of the DC power distribution system in accordance with Learjet Service Bulletin SB 55-24-4, and submit requests for alternative methods of compliance through an appropriate FAA Principal Maintenance Inspector.
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Compliance Time
Within 100 hours time-in-service or 90 days after the effective date of this AD, whichever occurs later
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Affected Aircraft
Learjet Model 55, 55B, and 55C airplanes; serial numbers 55-003 through 55-147, inclusive; certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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