PW1100G Pratt & Whitney
P12 Fan Case Install

Engine-Wash Timing Still Under Evaluation For New Powerplants

To wash or not to wash? That is the question.

SINGAPORE—Determining when to wash new engines—the process of which reduces fuel burn and lowers exhaust gas temperature (EGT)—is still under evaluation for a couple of new powerplants.

“We’re still trying to figure out optimal engine wash frequencies,” said Paul Finklestein, Pratt & Whitney’s marketing director. He referred to Pratt & Whitney’s geared turbofans while speaking at Aviation Week’s Aero-Engines Asia-Pacific Conference here. The operating environment plays a big role in the decision but, “There is a tendency to wash more often when fuel prices go up,” he added.

Finklestein noted that Pratt & Whitney has more than 8,000 orders and commitments for the geared turbofan, which entered service about one year ago on the Airbus A320neo.

Engine-wash intervals for CFM International’s Leap engine are also undecided. That type entered service one year ago on a Pegasus Airlines Airbus A320neo. Jacopo Lucioli, Safran Aircraft Engines’ marketing service manager, said the EGT margin is performing as expected. Until the margin starts deteriorating, it’s difficult to determine engine-wash frequencies. However, he expects the timing to be similar to CFM56 engines.

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