AD 2005-07-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A330 | Airworthiness Directives; Airbus Model A330, A340-200, and A340-300 Series Airplanes |
Unsafe Condition
Degraded operation of the trimmable horizontal stabilizer actuator (THSA) due to the entrance of water into the ball nut, which could lead to reduced controllability of the airplane.
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Required Actions
Inspect for discrepancies of the ball screw assembly and take corrective action if necessary. Repetitively grease the THSA ball nut and replace the THSA if necessary. Modify or replace the ball nut assembly as applicable to end certain repetitive inspections.
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Compliance Time
Before further flight if a 'F/CTL PRIM X PITCH FAULT' or 'F/CTL STAB CTL FAULT' warning message is displayed on the ECAM associated with the 'PITCH TRIM ACTR (1CS)' maintenance message.
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Affected Aircraft
Airbus Model A330, A340-200, and A340-300 series airplanes, including specific serial numbers as detailed in Airbus Service Bulletin A330-27-3102, Revision 05.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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