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.