What happened
During a scheduled local training session at Mountain Home Airport, a four-engine bomber was performing a series of touch-and-go maneuvers. Shortly after departing the runway, the aircraft entered an uncontrollable state while in its initial climb. The plane traveled approximately 1,300 feet beyond the end of the runway before striking the ground.
The impact resulted in a massive explosion that caused the aircraft to disintegrate. There were seven fatalities among the crew members on board; no survivors were reported from the flight.
Findings
Upon impact, the aircraft underwent total structural failure and ignited a large-scale fire. The sequence of events indicates that the loss of control occurred during the transition from takeoff to the climb phase.