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United Airlines Holdings Inc. discovered dubious parts in two aircraft engines, adding to the list of carriers worldwide that have found bogus components from supplier AOG Technics Ltd.

The parts were discovered in a single engine on each of two aircraft, including one that was already undergoing routine maintenance, a spokesperson for United said Monday. The Chicago-based airline is replacing the engines before the planes are returned to flying, he said.

United discovered the parts based on new information from its suppliers, and will continue to investigate as more details become available, the company said. The parts were seals on compressor stator vanes that help direct airflow inside the engine. United didn’t immediately say which type of aircraft the engines had powered.

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The company’s disclosure makes it the latest major carrier to confirm that suspect components from AOG were installed in their fleet, including Southwest Airlines Co. and Virgin Australia Airlines Pty. Aviation regulators have said AOG supplied an unknown number of jet engine spare parts backed by falsified airworthiness documentation, kicking off a worldwide effort by the industry to hunt down more components.

CFM International Inc., the joint venture of General Electric Co. and Safran SA that makes the engines for many older-generation Airbus SE A320 and Boeing 737 aircraft, previously said parts with fraudulent documentation had been used in 68 of its power plants.

–With assistance from Ryan Beene.

Photograph: United Airlines aircraft at Denver International Airport in Denver, Colo., on Saturday, Aug. 19, 2023. Photo credit: Bing Guan/Bloomberg

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• Virgin Australia Finds Second Bogus Jet Part With Fake Certificate

Topics Aviation