Prior to 2007, the FAA used the term for Extended Range Operation with Two-Engine Airplanes but the meaning was changed when regulations were broadened to include aircraft with more than two engines.[21]参考译文:在2007年之前,联邦航空管理局使用该术语来描述双引擎飞机的延长航程操作,但当法规扩大到...
First flown in 1985, ETOPS(Extended Range Two Engines Operations) is a conservative, evolutionary program that enhances safety, reliability, and efficiency during extended operations, which are flight operations on routes that at times take the airplane far from an alternate airport. Twinjets operated...
In 1988, the FAA amended the ETOPS regulation to allow the extension to a 180-minute diversion ...