AD 98-16-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Learjet Inc. | 60 | Airworthiness Directives; Learjet Model 60 Airplanes |
Unsafe Condition
Abnormal (uneven) brake wear condition of the friction material on the rotating disks due to thermal gradients within the brake stack of the ABS brake assembly, which could result in loss of brake effectiveness.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Measure the brake wear dimension between the housing subassembly and the pressure plate adjacent to the top pistons of the brake assembly within 10 flight hours after the AD's effective date. Repeat measurements at intervals not exceeding 25 flight cycles based on the measured dimension. Perform visual inspections for abnormal wear and replace disks or disk stacks as specified in ABS Service Bulletin LEAR 60-32-03.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 flight hours after the effective date of this AD, and thereafter at intervals not to exceed 25 flight cycles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Learjet Model 60 airplanes equipped with Aircraft Braking Systems (ABS) brake assemblies having part number 5003096-7.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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