Multi-year procurement is expected to save as much as $427 million over annual contracts, the US Department of Defense estimates.
Troops board an MV-22 in Iraq © US Marine Corps
Orders for the Osprey now total 299, of which 100 have been delivered. Twelve Marine Corps MV-22s have been operational in Iraq since October 2007.
The USMC plans to procure a total of 360 MV-22s, while USAF Special Operations Command is to receive 50 CV-22s. A further 50 combat search-and-rescue HV-22s for the US Navy is planned, but not yet funded.