Raytheon Co., a Massachusetts-based defense contractor with a Rhode Island production facility, has put almost 900 air-to-air missiles for U.S. and allied air forces in storage because they’re missing a major component – motors, Bloomberg News reported last week.

The Advanced Medium-Range Air-to-Air Missiles are fully assembled guidance sections “without rocket motors and they are being stored at Raytheon Missile Systems awaiting final assembly as new motors become available,” according to a statement from U.S. Air Force spokesman Charles Gulick.

The Air Force earlier provided data indicating that the missiles had been “delivered” through Nov. 30, a quantity about 900 short of contract requirements. The service didn’t mention that those missiles were missing their motors and were still held by Raytheon.

The delayed weapons are the newest version of the Advanced Medium-Range Air-to-Air Missile. They’re intended for deployment to U.S. Air Force fighter wings and U.S. Navy air wings once testing is done and they’re declared combat-ready. •