Airlines say new engines are not delivering promised reliability

Airline CEOs say the latest generation of more fuelefficient jet engines is not living up to expectations on reliability and availability. The issue was discussed at the International Air Transport Association's annual meeting in Rio de Janeiro, where executives said engines are being pulled from service earlier than planned for maintenance. Carriers had expected the engines to cut fuel use and lower operating costs, but unscheduled repairs are reducing those savings. Airlines are also dealing with aircraft shortages, higher fuel costs, and limited maintenance capacity, which is keeping more planes on the ground. Engine makers, including GE Aerospace, Pratt & Whitney, and RollsRoyce, say they have been investing in production and maintenance improvements and are making progress. Even so, airline leaders said parts shortages and reliability problems could remain a major constraint for several more years.