C. Mead Stull Sr., 76, a retired federal engineer who later served on Fairfax County's planning commission and board of supervisors, died of cancer Saturday at Fairfax Hospital.

A specialist of mine safety, Mr. Stull was a coal mine engineer in Birmingham, Ala., before joining the mine safety division of the Bureau of Mines here in 1930.

After World War II, he transferred to the Department of Commerce. He was chief of the lubricants and chemical section in the office of export supply when he retired in 1963. During World War II, he served as a Navy lieutenant commander in the Office of Procurement and Material, where he was in charge of fuel for U.S. naval shore stations.

He was recalled to active duty and served as chief of operations and safety for government-seized coal mines during this country's 1946 coal miners strike.

Mr. Stull was born in Virginia and earned a bachelor's degree in engineering from the Virginia Polytechnic Institute.

He was a member of the Fairfax County Planning Commission for five years and a member of the county's park authority for six years before serving as county supervisor from the Centreville district in 1966 and 1967.

He was a charter member of the Fairfax Hospital Association and was chairman of the finance committee and association treasurer at the time of his death.

Mr. Stull also was a member of the board of directors of the Fairfax County Historical Society and served on the District Nursing Home Board.

Before moving to Burke, Va., in 1974, he lived in Centreville and was a past director and treasurer of the Centreville Volunteer Fire Department. He also was a past president of the Centreville Lions Club.

His first wife, Louise J. Stull, died in 1970.

Survivors include his wife, Elizabeth B., of the home; a son, C. Mead Jr., of Annandale; three granddaughters and two great-great-grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Fairfax Hospital Association, Falls Church, Va. 22046. CAPTION: Picture, C. Mead Stull Sr.