AD 2001-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet | 55 | Airworthiness Directives; Learjet Model 55 Series Airplanes and Model 60 Airplanes |
Unsafe Condition
Bottoming of the valve components before contact of the brake valve lever with the stop, which could result in loss of all hydraulic fluid and consequent loss of normal braking.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the brake valve adjustment screws with new improved screws. For certain airplanes, also replace the existing brake valve lever stop with a new brake valve lever stop.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 300 flight hours or one year after the effective date of this AD, whichever occurs first.
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Affected Aircraft
Learjet Model 55 series airplanes, serial numbers 55-003 through 55-147 inclusive, and Model 60 airplanes, serial numbers 60-002 through 60-189 inclusive; certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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