Lyman Haskell (Jack) Dishman, 81, a retired hearing examiner with the Interstate Commerce Commission, died at George Washington University Hospital Monday following a heart attack.

Mr. Dishman joined the ICC as an attorney in 1929. He was appointed a hearing examiner in 1950 and held that position until he retired in December 1969. Hearing examiners are now called administrative law judges and they are the "trial judges" of the agency.

A native of Forbes, Tenn., Mr. Dishman came here to study law at George Washington University, and received a law degree in 1925. He earned a bachelor of arts degree from GW in 1931 and was an active alumnus.

During World War ii, he was captain in the Army Judge Advocate General's Corps and was assigned to West Point, N.Y.

Mr. Dishman was a member of the GW Luther Rice Society, the GW Law Association, the GW University Club and the GW Colonials Inc., a group of sports boosters. He also was a Mason and a member of Warren G. Harding Lodge No.39, and belonged to the National Press Club and Kenwood Country Club. He lived in Washington.

Survivors include a sister, Mrs. Glennis Allred, of Livingston, Tenn.

The family suggests that expressions of sympathy be in the form of contributions to the Jack Dishman Memorial Fund, George Washington University Library, Room 701, Washington, 20052.