AD 89-02-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 757-200 Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200CB Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200PF Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-300 Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
Unsafe Condition
Loss of airplane braking due to a single hydraulic failure.
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Required Actions
Inspect Group 1 and 2 airplanes' left and right alternate antiskid valve module return ports for proper check valve configuration and correct if necessary. Remove reducer unions from Group 1 airplanes' left and right alternate brake metering valve module return ports and install check valves, all in accordance with Boeing Alert Service Bulletin 757-32A0081 dated June 24, 1988.
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Compliance Time
within the next 120 days after the effective date of this AD, unless previously accomplished
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Affected Aircraft
Boeing Model 757 series airplanes, Group 1 and Group 2, as listed in Boeing Alert Service Bulletin 757-32A0081 dated June 24, 1988, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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