AD 98-06-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BAE Systems (Operations) Limited | ATP | Airworthiness Directives; British Aerospace BAe Model ATP Airplanes |
Unsafe Condition
Uneven wear at the pressure stator/first rotor interface of the main landing gear brake unit heat pack, which could result in pressure stator failure, reduced braking efficiency, and longer stopping distances upon landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect brake units of left and right main landing gear to detect uneven wear at the pressure stator/first rotor interface, measure wear remaining length (WRL) of wear indicator pin (WIP), and replace brake heat pack unit with a serviceable unit if necessary. Repeat inspections at intervals not to exceed 300 hours time-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 300 hours time-in-service after the effective date of this AD (April 23, 1998).
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Affected Aircraft
BAe Model ATP airplanes with constructors numbers 2002 through 2067 inclusive.
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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