Edward Jackson Hildebrand III, 25, a vice president and director of the Blaydes Lock Co. of Washington and Baltimore, died April 12 from injuries sustained in an automobile accident.

Mr. Hildebrand was killed when the car he was driving crashed into the back of a tractor-trailer on Interstate 295 just outside the District line and burst into flames. Mr. Hildebrand and his passenger, Donald P. Martin of Alexandria, Va. were killed instantly.

Maryland State Police said the accident occurred after the driver of the tractor-trailer tried to make a left turn in the emergency vehicle turning lane on the highway just south of the District line. The driver of the truck was charged with negligent driving as a result of the accident. Born in Anderson, S.C., Mr. Hildebrand graduated from Fort Hunt High School in Alexandria, Va., and attended Mesa College in San Diego, Calif. and the University of Maryland at College Park.

A resident of Crofton, Md., Mr. Hildebrand attended Ashton United Methodist Church in Ashton, Md.

He is survived by his wife, Bonnie O'Neale Hildebrand, of the home at 1643 Forest Hill Ct., his parents, Mr. and Mrs. Edward J. Hildebrand, Jr., and brother, Andrew, of Alexandria, Va., grandmother, Evelyn Hildebrand of Silver Spring, Md., and grandparents, Mr. and Mrs. L. A. Brooks, Sr. of Anderson, S.C.