GE和波音公司于3月30日开始进行GE90/波音777的ETOPS飞行试验,在4小时17分钟的飞行中,编号为WAO77的飞机从西雅图附近的波音公司外场飞到加拿大的弗罗比舍贝。按计划这架飞机在加拿大停留几周,以便在冷天状况下累计E-TOPS循环。计划进度要求1000循环飞行试验计划在7月末结束,8月初获得FAA180分钟E-TOPS批准。最初的进度要求GE90/波音777在飞机取得合格证时获准180分钟ETOPS。但 GE and Boeing began the ETOPS flight test on the GE90 / Boeing 777 on March 30, during a 4-hour, 17-minute flight, the WAO77 aircraft flew from the Boeing outpost near Seattle to Florida’s Froebeyshebei . The plane was scheduled to stay in Canada for several weeks in order to accumulate E-TOPS cycles in cold weather conditions. The planned schedule calls for the 1,000-cycle pilot to conclude in late July and the FAA 180-minute E-TOPS approval in early August. The initial schedule required the GE90 / Boeing 777 to receive a 180-minute ETOPS when the aircraft was certified. but