AD 2011-15-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A300 B4-600 | Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model A300 C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes); and Model A310 Series Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus Model A300 B4-600, B4-600R, and F4-600R Series Airplanes, and Model A300 C4-605R Variant F Airplanes (Collectively Called A300-600 Series Airplanes); and Model A310 Series Airplanes |
Unsafe Condition
A specific failure case of the THSA upper primary attachment, which may result in a loading of the upper secondary attachment, has been identified. Primary load path failure can be caused by bearing migration from the upper attachment gimbal by failure or loss of a retention bolt. In case of failure of the THSA upper primary attachment, the THSA upper secondary attachment would engage, potentially leading to secondary load path failure and loss of control of the aeroplane.
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Required Actions
Install three retention plates on the THSA upper primary attachment, in accordance with the Accomplishment Instructions of Airbus Mandatory Service Bulletin A300-27-6066 (for Model A300-600 series airplanes) or Airbus Mandatory Service Bulletin A310-27-2103 (for Model A310 series airplanes).
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Compliance Time
Within 30 months after the effective date of this AD.
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Affected Aircraft
All Airbus Model A300 B4-601, B4-603, B4-620, and B4-622 airplanes, Model A300 B4-605R and B4-622R airplanes, Model A300 F4-605R and F4-622R airplanes, Model A300 C4-605R Variant F airplanes, and Model A310-203, -204, -221, -222, -304, -322, -324, and -325 airplanes; certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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