AD 2012-16-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Extensive corrosion of the ballscrew of the drive mechanism of the horizontal stabilizer trim actuator, which could lead to undetected failure of the primary and secondary load paths for the ballscrew in the horizontal stabilizer, resulting in loss of control of the horizontal stabilizer and consequent loss of control of the airplane.
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Required Actions
Repetitive detailed inspections for discrepancies of the horizontal stabilizer ballscrew assembly; repetitive lubrication of the horizontal stabilizer trim control system; repetitive measurements for discrepancies of the ballscrew to ballnut freeplay; and corrective actions, if necessary.
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Compliance Time
Within specified intervals (not detailed in the provided text).
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Affected Aircraft
All The Boeing Company Model 757 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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