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EASA Says Misassembled Engines Are Now Repaired

Rolls-Royce updated production instructions to correct an issue with Trent XWBs at the source.

Operators have identified all the Trent XWBs affected by a production-line glitch that led to some being assembled incorrectly, the EASA says, allowing cancellation of a mandated inspection. The original directive said the manufacturing problem—assembly of the low-pressure (LP) compressor disc to the LP compressor shaft with the bolt holes misaligned—affected 40 engines. Operators were ordered to inspect the engines, identified by serial number, and determine if rework was necessary. Rolls-Royce issued the service recommendation in February.

The OEM also “amended the manufacturing instructions for new engines, the instructions of the overhaul manual were revised to include additional checks and caution notes, improvements were made to tooling, and timing marks have been introduced on the components,” EASA explained. “In addition, it was established that all affected engines have been inspected and, where necessary, corrected.” 

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