Frank T. Mundy, 63, a retired D.C. school principal and administrator, died Thursday at his home in College Park after a heart attack.

Mr. Mundy came to Washington and began teaching in public elementary schools in 1938. In 1950, he became an elementary school principal and served at Haynes, Maury, and River Terrace, before being named executive assistant to the assistant school superintendent for personnel in 1968, a job he held until retiring in 1972.

He served as personnel director at D.C. Teachers College and assistant to the president of Federal City College, then worked in 1976 and 1977 as a lanor relations consultant during the merger of D.C. Teachers, Federal City and the Washington Technical Institute into the new University of the District of Columbia.

Mr. Mundy served as chairman of the textbook committee during the 1940s, and had been an officer of the Elementary Principals Association and the D.C. Education Association.

He was a native of New York City and earned a bachelor's degree at Brooklyn College and a master's degree at the old City College of New York in 1937.

He is survived by his wife, Nina, of the home; a danghter, Lorraine M. Deanes, of Annapolis, and one grandchild.