AD 2011-10-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company Model 747-400 | Airworthiness Directives; The Boeing Company Model 747-400, 747-400D, and 747-400F Series Airplanes Equipped With General Electric CF6-80C2 or Pratt & Whitney PW4000 Series Engines |
| engine | Pratt & Whitney | PW4000 Series | Airworthiness Directives; The Boeing Company Model 747-400, 747-400D, and 747-400F Series Airplanes Equipped With General Electric CF6-80C2 or Pratt & Whitney PW4000 Series Engines |
Unsafe Condition
Automatic retraction of the leading edge flaps due to indications transmitted to the flap control unit (FCU) from the thrust reverser control system during takeoff.
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Required Actions
Modify the thrust reverser control system wiring to the FCU in the P252 and P253 thrust reverser relay panels (for PW4000 engines) or in the P414 and P415 power distribution panels (for CF6-80C2 engines), in accordance with specified service bulletins.
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Compliance Time
Within 36 months after the effective date of this AD.
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Affected Aircraft
The Boeing Company Model 747-400, 747-400D, and 747-400F series airplanes equipped with General Electric CF6-80C2 or Pratt & Whitney PW4000 series engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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