A new Pentagon order for V-22 Osprey tiltrotors could boost prospects for more rapid development of the BA609 civil tiltrotor. The U.S. Department of Defense signed a $10.4 billion contract for 167 more Bell-Boeing V-22 Osprey military tiltrotors over the next five years, despite continuing engine problems on the machine. The Marine Corps will receive 141 MV-22s and the Air Force 26 CV-22s for its Special Operations Command.