Loss of engine coolant caused the crash of an MQ-1 Predator remotely piloted aircraft just outside the perimeter fence of Kandahar Airfield, Afghanistan, on January 30, announced Air Combat Command officials. The aircraft’s coolant pump supply line failed, releasing coolant, and leading to the engine’s temperature increasing “excessively,” according to ACC’s May 30 release citing the findings of the abbreviated accident investigation board report. The temperature increase reduced power output and prevented sustained flight, causing the airplane to fall into an uncontrolled descent, states the release. Remote operators regained control long enough to guide the Predator to a forced landing, it notes. The aircraft was destroyed on impact, along with one Hellfire air-to-ground missile. The damage amounted to an estimated $4.5 million, according to ACC. Among the contributing factors, investigators found that a maintainer failed to detect damage on the coolant supply line during a 60-hour engine inspection four days prior to the mishap. (AIB report; caution, large-sized file.)
The U.S., South Korea, and Japan flew an unusual trilateral flight with two U.S. B-52H Stratofortress bombers escorted by two Japan Air Self-Defense Force F-2s, and two ROK Air Force KF-16 fighters—both countries’ respective variants of the F-16—July 11. That same weekend, the top military officers of the three nations…