The GE9X engine (left) on a Boeing 747 test bed. Problems with the big, new powerplant have delayed the first flight of the Boeing 777X. (GE Aviation)

The GE9X engine (left) on a Boeing 747 test bed. Problems with the big, new powerplant have delayed the first flight of the Boeing 777X. (GE Aviation)

Engine snag delays first flight of Boeing 777X until fall

GE says it has a fix for the plane’s big GE9X engines, but it will be months before they are certified.

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