Stillnss C. Millington, 48, an electrocies engineer with the Federal Aviation Administration, died of cancel Tuesday at the Southern Maryland Hostpital Center in Clinton.

Before jointing the FAA about 10 years ago, he had worked at the Harry Diamond Laboratory here.

Mr. Millington was a helicopter instructor with the U.S. Air Force, serving from 1963 until leaving the military in 1966. His last assignment was at Bolling Air Force Base here.

He was born in Burlington, Vt. He received a degree in physics from the University of Vermoni and a degree in engineering from Texas Technology a book on flying helicopters.

A beekeeper by avocation, Mr. Millington was amember of the Maryland Bee Association. He was active in the Upper Mariboro Boys and Girls Club, where he started a soccer program. He belonged to the Oxon Hill Lutheran Church.

He is survived by his wife, the former Barbara Miner, and four children, Guy, Rebecca, Doyle and Layne, all of the home in Upper Marboro; his mother, Ruth Millington, two brothers, Clyde and David, and a sister, Wendy Glenn, all of Burington.

The family suggests that expressions of sympathy may be in the form of contributions to the Vincent T. Lombardi Research Cancer Center at Georgetown University Hospital.