AD 2013-16-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A330-300 | Airworthiness Directives; Airbus Airplanes |
Unsafe Condition
Ballscrew rupture could occur on certain trimmable horizontal stabilizer actuators (THSAs), which, along with corrosion on the ballscrew lower splines, may lead to loss of transmission of THSA torque loads from the ballscrew to the tie-bar and consequent THSA blowback, which could result in loss of control of the airplane.
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Required Actions
Perform repetitive THSA ballscrew shaft integrity tests in accordance with specified Airbus Mandatory Service Bulletins. Replace the THSA with a serviceable one if the test results are not correct, before further flight.
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Compliance Time
Within the later of 12,000 flight hours or 4,400 flight cycles since the most recent THSA ballscrew shaft integrity test, or within 1,000 flight hours after the effective date of this AD, but not exceeding 16,000 flight hours since the most recent test.
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Affected Aircraft
Airbus Model A330-301, -302, -303, -321, -322, -323, -341, -342, and -343 airplanes; and Model A340-211, -212, -213, -311, -312, and -313 airplanes, all serial numbers, if fitted with a THSA having part number (P/N) 47147-500 or P/N 47147-700.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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