"The V-22 Program is continually investigating ways to reduce the life cycle costs of the aircraft," announced the U.S. Navy by email. "Knowing that more than 90% of the operational use of the V-22 is in the future, coupled with budget pressures, it is prudent to investigate alternatives to existing systems and the engine is no exception."
Each V-22 is currently powered by two Rolls-Royce AE1107C engines.
The U.S. Marine Corp is in the process of acquiring 360 MV-22s, while the Pentagon this fiscal year is acquiring the last CV-22s for the Air Force. The aircraft are also attracting several overseas buyers.