On October 16, 1969, at 1545 P.d.t., Seaboard World Airlines, McDonnell Douglas DC-8-63F, N8634, overran the departure end of Runway 29R at Stockton Metropolitan Airport, California, during the performance of a crew training flight. The aircraft struck a roadway thereby collapsing the left main and nose landing gears. The aircraft cam to rest 792 feet beyond the end of the runway. The aircraft was destroyed by fire. The five crewmembers aboard were uninjured. Seaboard World Airlines E-8, N8634, on October 16, 1969, was scheduled for use for recurrent training and annual proficiency checks of first officers in DC-8 equipment. The flight originated at the Oakland International Airport (OAK) and was to terminate at OAK. Training maneuvers were to be conducted in the Stockton, California, area, with landing and takeoff practice to be performed at the Stockton Metropolitan Airport. During a touch-and-go landing on Runway 29R at the Stockton Metropolitan Airport, the captain rejected the takeoff because of the sounding of a takeoff warning horn and the activation of a ground spoiler extend light. The crew was not able to stop the aircraft on the remaining runway.