AD 2009-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 777 | Airworthiness Directives; Boeing Model 777 Airplanes |
Unsafe Condition
Extensive corrosion of the ballscrew in the drive mechanism of the horizontal stabilizer, leading to undetected failure of the primary load path and subsequent wear and failure of the secondary load path, which could result in loss of control of the horizontal stabilizer and consequent loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the drive mechanism of the horizontal stabilizer for discrepancies, lubricate the ballnut and ballscrew, measure the freeplay between the ballnut and ballscrew, and take corrective action if necessary. These actions must be performed at revised compliance times specified in the AD.
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Compliance Time
Within the revised compliance times specified in the AD, which are detailed in the service bulletin referenced in the AD.
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Affected Aircraft
All Boeing Model 777 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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