AD 2006-10-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Airplanes |
Unsafe Condition
Extensive corrosion of the ballscrew in the drive mechanism of the horizontal stabilizer could lead to undetected failure of the primary load path, subsequent wear and failure of the secondary load path, and loss of control of the horizontal stabilizer, which could result in loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Repetitive detailed inspections for discrepancies and loose ball bearings; repetitive lubrication of the ballnut and ballscrew; repetitive measurements of the freeplay between the ballnut and the ballscrew; and corrective action if necessary.
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Compliance Time
Within the compliance times specified in the AD, unless the actions have already been done per the referenced service bulletin.
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Affected Aircraft
All Boeing Model 747 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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