AD 99-04-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | British Aerospace Regional Aircraft | Jetstream 3201 | Airworthiness Directives; British Aerospace Jetstream Models 3101 and 3201 Airplanes |
| aircraft | British Aerospace Regional Aircraft | Jetstream Series 3101 | Airworthiness Directives; British Aerospace Jetstream Models 3101 and 3201 Airplanes |
Unsafe Condition
Failure of the main landing gear brakes because the wear indicator pins present a false indication of the remaining wear of the brake units, which could result in loss of control of the airplane during takeoff, landing, or taxi operations.
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Required Actions
Inspect the main landing gear brake units for correct setting of the wear indicator pins within 30 calendar days after the effective date. Re-set the pins if incorrect prior to further flight, following British Aerospace Jetstream Alert Service Bulletin 32-A-JA980540.
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Compliance Time
Within the next 30 calendar days after the effective date of this AD
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Affected Aircraft
Jetstream Model 3101 airplanes with Jetstream Kit JK12097 or Service Bulletin 32-JK12097, and Jetstream Model 3201 airplanes equipped with Dunlop AH54450 brake units, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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