AD 2016-25-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Uncommanded autopilot engagement events resulting in incorrect stabilizer trim adjustment during takeoff.
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Required Actions
Depending on the model/configuration, install an on-ground stabilizer autotrim inhibit system, relays and related wiring to open and close the flight control computer (FCC) analog output, and new operational program software (OPS) into the FCCs. Perform routine functional testing of the installed systems and take corrective actions if necessary.
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Compliance Time
Within 12 months of the effective date (January 31, 2017).
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Affected Aircraft
The Boeing Company Model 747-400, 747-400D, and 747-400F series airplanes; Model 757 airplanes; and Model 767-200, -300, -300F, and -400ER series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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