AD 2013-25-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A330-200 and -300 | Airworthiness Directives; Airbus Airplanes |
Unsafe Condition
Loosening of check valves, Part Number (P/N) CAR401, which could result in hydraulic leaks, possibly leading to the loss of all three hydraulic systems and consequent loss of control of the airplane.
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Required Actions
Inspect check valves P/N CAR401 for lock wire presence and integrity, traces of seepage or black deposits, proper torque, and alignment of the check valve and manifold. Install new lock wire and take corrective actions if needed. Revise the torque values for check valve tightening and implement a repetitive inspection program for certain check valves in the hydraulic systems on airplanes that have had a specific modification during production or in-service.
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Compliance Time
Within 1,000 flight hours after the effective date of this AD.
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Affected Aircraft
Airbus Model A330-200 and -300 series airplanes, and Model A340-200 and -300 series airplanes equipped with check valves P/N CAR401 installed in production through Airbus modification 54491, or installed in service through Airbus Service Bulletin (SB) A330-29-3101 or Airbus SB A340-29-4078.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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