AD 2013-13-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet | Inc | Airworthiness Directives; Learjet Inc. Airplanes |
Unsafe Condition
Failure of the braking system or adverse operation of the spoiler and thrust reverser system due to external damage, particularly from tire failure.
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Required Actions
Install new rigid hydraulic tube assemblies to the MLG struts; install a new MLG squat switch bracket; modify the MLG squat switch wire harness; modify the MLG anti-skid wheel transducer electrical wire harnesses; route and secure the anti-skid wheel and squat switch electrical wire harnesses to the MLG strut assembly; install outboard bracket assemblies, anti-skid shield, forward electrical cover, upper and lower inboard bracket assemblies, and clamps; modify the aft stiffener; install the aft electrical cover and strap; install a new flat landing light lamp if necessary; and for certain airplanes, install a new wheel speed detect box assembly, nutplates, brackets, and a new thrust reverser interface box, and modify the wiring for the new thrust reverser interface box.
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Compliance Time
Before further flight
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Affected Aircraft
Learjet Inc. Model 60 airplanes, certificated in any configuration.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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