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If a system that operates stably in a steady state and has a certain tolerance range for small perturbations can be utilized, it would simplify the structure and control of combustors, and increase the feasibility of commercializing new combustor designs.

Rick Lowden, a research scientist at Oak Ridge National Laboratory, which developed the ceramic material, said that without such a coating, moisture in the gas emerging from the combustor will oxidize the ceramics and gradually “eat it away.”

Two people familiar with the issue said the problem affected a part attached to the combustor inside the engine, the most powerful powerplant developed by the UK engine maker.

Two people familiar with the issue said the problem affected a part attached to the combustor inside the engine, the most powerful powerplant developed by the UK engine maker.

A Pratt and Whitney spokeswoman referred a reporter to a company statement which said it added a combustor lining inspection to its regular scheduled maintenance of the PW1500G engine.