AD Amdt-39-11462
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 and 767 | Airworthiness Directives; Boeing Model 747-400 and 767 Series Airplanes Powered by Pratt & Whitney PW4000 Series Engines |
| engine | Pratt & Whitney | PW4000 Series | Airworthiness Directives; Boeing Model 747-400 and 767 Series Airplanes Powered by Pratt & Whitney PW4000 Series Engines |
Unsafe Condition
Failure of the thrust reverser deactivation pins, which could result in deployment of the thrust reverser in flight and consequent reduced controllability of the airplane.
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Required Actions
Replace the existing deactivation pin, pin bushing in the aft cascade mounting ring, and insert flange on each thrust reverser half with new, improved components, in accordance with the applicable Boeing service bulletin.
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Compliance Time
Within 24 months after the effective date of this AD.
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Affected Aircraft
Boeing Model 747-400 series airplanes powered by Pratt & Whitney PW4000 series engines, as listed in Boeing Service Bulletin 747-78A2165, Revision 1, dated May 13, 1999; and Model 767 series airplanes powered by Pratt & Whitney PW4000 series engines, as listed in Boeing Alert Service Bulletin 767-78A0080, dated February 25, 1999; certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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