Air Force Col. Dennis G. Scarborough, 39, a decorated combat veteran of the fighting in Southeast Asia who was a resident of Springfield, died July 5 in an Air Force training accident over the Florida straits.

An Air Force spokesman said that Col. Scarborough and another crewman, Air Force Capt. Timothy J. Spence, 31, who was stationed at Homestead Air Force Base in Florida, were killed when their F4D Phantom jet crashed about 85 miles south of Miami. The spokesman said the accident is being investigated.

Col. Scarborough was assigned to Homestead Air Force Base in Florida before going to South Korea as deputy commander for operations of the 51st Tactical Fighter Wing.

He had flown combat missions in Phantoms in Southeast Asia. He was stationed in South Vietnam from March 1967 to April 1968, and in Thailand from February to September 1974. During that time he was awarded two Distinguished Flying Crosses and 15 Air Medals.

Col. Scarborough was a native of Idaho. He was a 1965 graduate of the U.S. Air Force Academy in Colorado, and had recently graduated from the National War College. In addition to serving in Southeast Asia, he had held staff positions and had been a pilot and instructor with the Air Training and Tactical Air commands.

He moved to the Washington area in 1977, and held posts in the office of the Joint Chiefs of Staff and the Air Force Chief of Staff, and had served on the Joint Staff before reporting to the National War College last year.

He was a member of St. John's Methodist Church in Springfield. He was a scoutmaster of Boy Scout Troop 1527 and served on the board of the Ravensworth Farm Swim and Racquet Club, both in Springfield. He was a member of the Ravensworth Farm Citizens Association.

Survivors include his wife, Nancy, and three children, Jamie, Dennis and Sharon, all of Springfield; his parents, Mr. and Mrs. Kermit Scarborough, of Meridian, Idaho, and two brothers, Kermit Jr., of Oregon, and Jack, a Marine Corps captain stationed at Parris Island, S.C.