Retired Air Force Col. Ben Carr Liles, 63, a former administrator for the Armed Forces Institute of Pathology in Washington and a health care planning consultant here, died Friday at Northern Virginia Doctors Hospital after a heart attack.

Col. Liles served for 29 years in the Army Air Corps and Air Force before retiring in 1965. He was a former branch chief in the procurement division of the Air Force Surgeon General's Office and was executive officer of the Air Force Hospital in Wiesbaden, Germany, before moving to this area in 1958.

He then served as administrator of the department of pathology at the Armed Forces Institute until 1961. His last assignment was an assistant for medical facilities planning in the office of the deputy assistant of the Secretary of Defense for Health and Medicine.

Following his retirement, Col. Liles was a senior technical specialist in the life sciences division of North American Rockwell in California.

In recent years, he was a consultant for the Appalachian Regional Commission in Washington, from which he retired in 1972.

Col. Liles was born in Rockingham, N.C., and attended Mars Hill College in North Carolina.

He received two Air Force commendation medals and a Joint Commendation Medal from the Defense Department for meritorious service.

Survivors include his wife, Grace, of the home in Arlington; two daughters, Jean L. Fatka of Ames, Iowa, and Donna L. Ferguson of Baton Rouge, La.; his mother, Ethel Liles of Rockingham, and five grandchildren. r

The family suggests that expressions of sympathy be in the form of contributions to the American Heart Association.