Frank John McConnell, 72, a retired transportation analyst with the General Accounting Office, died Friday at George Washington University of complications following open-heart surgery.

Mr. McConnell was born in Elizabeth, N.J., and later lived in New York City. He attended New York University, worked for a bank and then joined the Baltimore and Ohio railroad and worked in passenger relations.

He moved to Washington in 1941 and joined the GAO as a transportation analyst. A year later, he joined the Marine Corps and served for four years. He returned to the GAO and specialized in railroad rates and tariffs. For some years, he was an aide in the agency's legal department.

After his retirement, he moved to Rossmoor Leisure World in Silver Spring, where he was active in the Kiwanis and other groups.

He was a member of the parish of St. Patrick's Catholic Church in Norbeck and of the Knights of Columbus.

Survivors include his wife, Dorothy, whom he married in 1931, of the home; a daughter, Mrs. Anthony J. Cullinane, of Chevy Chase; a son, David F., of Washington; two sisters, Mrs. Edward Merrell, of Kansas City, Kan., and Mrs. Robert Reihl, of Roselle Park, N.J., and six grandchildren.