Charles Brun, 76, a retired government employe who owned and operated Washington's first ski shop before retiring and moving to Pennsylvania, died of a heart ailment Friday at a hospital in Latrobe, Pa.

He closed the "Charlie Brun Ski Shop" in late 1966. He had operated the business for 31 years, first as a basement hobby workshop, and then for 11 years as a full-scale, retail-repair-rental store on Pennsylvania Avenue SE.

Mr. Brun was a native of Lucerene, Switzerland, and came to this country in 1928. He lived in New York City before coming to Washington in 1934 where he became an instrument designer at the Naval Gun Factory. During World War II he fashioned dies for the Norden bombsight. He was a supervisor and helped construct astronomical instruments for the Naval Observatory from 1944 until his retirement from the government in 1960.

He was an honorary member of the Ski Club of Washington.

In 1968, Mr. Brun moved to Normalville, Pa., where he and his wife, Rosel, built a Swiss-style ski chalet.

In addition to his wife, he is survived by two sons, Navy Cmdr. Charles, of Virginia Beach, and Jack, of Baton Rouge, La., and four grandchildren. o