HOME > BUSINESS > Emirates warns Boeing it will refuse 777x jets if they don't meet commitments Emirates warns Boeing it will refuse 777x jets if they don't meet commitments Reuters | May 24, 2021 11:12 PM EDT Emirates Airline President Tim Clark gestures as he speaks during an interview with Reuters in Dubai, United Arab Emirates, (Photo : REUTERS/Abdel Hadi Ramahi/File Photo) The head of Emirates airline, one of Boeing's biggest customers, has warned the U.S. planemaker that it would refuse delivery of 777x jets if they fall short of contractual performance commitments. In an interview broadcast on Monday, President Tim Clark said he had not received any performance details of the jet's engines so far even though test flights began in 2020.