Derivatives of the GE CF6 and Rolls-Royce Trent 800 were adapted from powering widebody aircraft to many warships.

Boeing (NYSE:BA) on Monday said it had reached a significant milestone in the development of its long-delayed 777X aircraft.

But Boeing won't be allowed to self-certify its planes as safe to fly — a practice the FAA revoked after the 737 Max crashes. 777 engine failure Some Boeing 777 planes powered by certain Pratt ...