AD 2018-18-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | SAS | Airworthiness Directives; Airbus SAS Airplanes |
Unsafe Condition
During an inspection on the A350 final assembly line, after engine installation, protective caps were found still in place on fire extinguishing lines at engine zone 1 and zone 3. Further investigations indicated that this failure of removing them, as the standard instructions specify, may have occurred on other aeroplanes. This condition, if not detected and corrected, could, in case of an engine fire, prevent extinguishing that engine fire, possibly resulting in reduced control of the aeroplane.
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Required Actions
Inspect for the presence of protective caps on fire extinguishing lines, and depending on findings, remove the protective caps and clean out any melted protective caps.
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Compliance Time
Before further flight
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Affected Aircraft
Airbus SAS Model A350-941 and -1041 airplanes, manufacturer serial numbers (MSN) that may be affected.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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