Why did EASA mandate A350-1000 engine inspections?

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EASA Mandated A350-1000 Engine Inspections Due to an In-Flight Fire Incident

The European Union Aviation Safety Agency (EASA) mandated inspections for Airbus A350-1000 aircraft powered by Rolls-Royce Trent XWB-97 engines following an in-flight engine fire experienced by a Cathay Pacific A350-1000. This incident, which occurred shortly after take-off, was attributed to a failure in a high-pressure fuel hose.
Cathay Pacific Incident Involved Fuel Hose Failure

The directive from EASA was directly prompted by a specific event involving Cathay Pacific, where a malfunction led to an engine fire. The failure of a high-pressure fuel hose was identified as the cause of the blaze, which, although promptly detected and extinguished, necessitated regulatory scrutiny of the affected engine type.
XWB-97 Engines Targeted by EASA Directive

The EASA's emergency directive specifically targeted the Trent XWB-97 engines, which are exclusively used on the A350-1000 variant. While similar in name to the XWB-84 engines found on the A350-900, EASA has noted that the XWB-97 engines possess distinct design characteristics and a different service history, justifying a focused inspection on the larger aircraft model.
Inspections Were Not Extended to A350-900 Engines

At the time of the directive, EASA stated that extending these mandatory inspections to the Trent XWB-84 engines, utilized in the A350-900 fleet, was not deemed necessary. This decision was based on the available information, which differentiated the two engine models despite their shared lineage, and indicated that the specific issue prompting the inspections was confined to the XWB-97 variant.

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Why did EASA mandate A350-1000 engine inspections?

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