AD 2023-02-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | SAS | Airworthiness Directives; Airbus SAS Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus SAS Airplanes |
Unsafe Condition
Reports of potential foreign object debris (FOD) contamination of the thermal relief valve (TRV) could lead to a fuel leak. The unsafe condition, if not addressed, could result in an auxiliary power unit (APU) or engine fire and contribute to an uncontrolled fire, possibly resulting in loss of control of the airplane.
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Required Actions
Replace affected auxiliary power unit (APU) low-pressure (LP) shut-off valves (SOVs), inspect to detect fuel leaks of affected engine LP SOVs and APU isolation shut-off valves (ISOVs), and applicable corrective actions, as specified in EASA AD 2022-0157.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
All Airbus SAS Model A350-941 and -1041 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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