AD 2013-22-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A330-300 | Airworthiness Directives; Airbus Airplanes |
Unsafe Condition
Corrosion found on certain trimmable horizontal stabilizer actuators (THSA), affecting the ballscrew lower splines between the tie bar and the screw-jack, which could lead to ballscrew rupture, loss of transmission of THSA torque loads, THSA blowback, and possibly loss of control of the airplane.
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Required Actions
Conduct repetitive detailed inspections for corrosion of certain THSAs. Perform ballscrew integrity tests if necessary. Replace any affected THSA with a serviceable or new and improved THSA, if necessary.
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Compliance Time
Within 12 months of effective date
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Affected Aircraft
All Airbus Model A330-300 series airplanes and Model A340-200 and -300 series airplanes with trimmable horizontal stabilizer actuators (THSA) Part Numbers 47147-500, 47147-700, and potentially 47147-400.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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