What happened
During the landing phase on Runway 28, the aircraft type touched down approximately one-third of the way down the 5,000-foot asphalt runway. The pilot in command attempted to engage the thrust reverser system, but the control handles would not move past the 'Deploy-Reverse-Idle' setting. After several attempts to cycle the levers, the pilot transitioned to using maximum braking.
Witnesses on board noted that the aircraft maintained a high rate of speed as it approached the runway terminus. Smoke, likely from the tires, was visible as the aircraft neared the end of the pavement. The aircraft exited the runway, leaving parallel tire marks that extended 3,200 feet beyond the approach end of the runway and onto a nearby grassy area. The aircraft eventually came to a stop on a plateau situated roughly 90 feet below the runway's elevation.
Findings
Investigation into the mechanical state of the aircraft, including the thrust reverser system, showed no evidence of malfunctions prior to the impact. Data from the cockpit voice recorder indicated the aircraft was traveling at approximately Vref plus twenty knots when passing the runway threshold. The pilot estimated the speed was still between 50 and 60 knots as the plane left the runway surface. The inability to deploy the thrust reverser system was a primary factor in the overrun, as the pilot had no prior experience landing this specific model without utilizing that system for deceleration.