AD 86-26-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 757-200 Series | BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200CB Series | BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200PF Series | BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-300 Series | BOEING Model 757 Series Airplanes |
Unsafe Condition
Uncommanded deployment of a thrust reverser in flight
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Required Actions
Inspect and install a restrictor check valve on the control port of both thrust reverser isolation valves; modify the unlock and auto-restow proximity sensors' installation in accordance with Boeing Alert Service Bulletin 757-78A0006 or later FAA-approved revision.
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Compliance Time
within 30 days after the effective date of this AD
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Affected Aircraft
Boeing Model 757 series airplanes equipped with Pratt and Whitney Aircraft PW2037 engines, as listed in Boeing Alert Service Bulletin 757-78A0006 dated August 7, 1986
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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