AD 2011-08-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A310 | Airworthiness Directives; Airbus Model A310 Series Airplanes; and Model A300 B4-600, A300 B4-600R, A300 F4-600R Series Airplanes, and Model A300 C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes) |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Model A310 Series Airplanes; and Model A300 B4-600, A300 B4-600R, A300 F4-600R Series Airplanes, and Model A300 C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes) |
Unsafe Condition
The ball screw nut assemblies of the first 70 Trimmable Horizontal Stabilizer Actuators (THSA) manufactured by Goodrich were fitted with an upper attachment gimbal having a thickness of 58 mm (2.28 in), which is different from the design of the final production standard. In case of failure of this gimbal, the THSA upper attachment primary load path would be lost, leading to engagement of the secondary load path, which may fail and result in loss of control of the airplane.
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Required Actions
Identify THSA with a 58 mm (2.28 in) gimbal installed. Perform repetitive general visual inspections to check for engagement of the secondary load path. Depending on findings, take associated corrective actions, including contacting Airbus for repair instructions and performing the repair.
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Compliance Time
Before further flight
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Affected Aircraft
Airbus Model A310 Series Airplanes and Model A300 B4-600, A300 B4-600R, A300 F4-600R Series Airplanes, and Model A300 C4-605R Variant F Airplanes (collectively called A300-600 Series Airplanes).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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