Retired Air Force Gen. Orval R. Cook, 81, a former deputy commander of U.S. forces in Europe, died at his home in Falls Church Tuesday after an apparent heart attack.

Gen. Cook, who was born in West Union, Ind., graduated from the Military Academy at West Point in 1922. Assigned to the old Army Air Corps, he became a pilot, but much of his career concerned engineering and logistics.

During World War II he was chief of the engineering section at what is now Wright-Patterson AFB in Dayton, Ohio, the headquarters of the Air Force Materiel Command. In 1945, he joined the Far East Air Force on Okinawa and the following year commanded the 7th Air Service Air Command in Japan and then the Far East Air Service Command.

From late 1946 until July 1948, he was assigned to the general staff in the old War Department as deputy director of the service, supply and procurement division.

In 1948, he returned to Wright-Patterson as deputy director of procurement and industrial mobilization planning. He was deputy to the commanding general for operations of the Air Materiel Command before becoming deputy commander of the U.S. European Command in 1954. He retired from the post in 1956.

Gen. Cook was president of the Aircraft Industries of America, an industry association, from 1956 until his second retirement in 1961.

He is also served as chairman of the Federal Aviation Administration's supersonic advisory group and was a member of the National Aeronautics and Space Administration's aerospace safety advisory panel in 1968.

Gen. Cook's military decorations included the Distinguished Service Medal, the Legion of Merit, and decorations from France and Italy.

Survivors include his wife, Minna E., of Falls Church; three sons, Peyton E., of Sewanee, Tenn., Orval E, of Cupertino, Calif, and Benjamin H., of Atlanta, and eight grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the American Cancer Society, 346 Maple Ave. East, Vienna, Va. 22180, or to the American Heart Association, 4231 Morkham St., Suite 225, Annandale, Va. 22003.