Navy Lt. j. g. Patrick Joseph Kilcline, 25, a graduate of Langley High School in McLean, was lost at sea Sunday about 98 miles south of San Diego, Calif., the Navy Department said.

A member of Fighter Squadron 211, he was flying his F-14 fighter during flight operations from the aircraft carrier U.S.S. Constellation when he went down.

Lt. Kilcline was the son of Rear Adm. Thomas J. Kilcline and Dornell Kilcline, of Washington. His father is chief of legislation affairs with the Department of the Navy.

Born in San Francisco, Lt. Kilcline attended schools in Sanford, Fla., Nice, France, Coronado, Calif., and Virginia Beach, before moving here. He was a letterman in basketball and football during his senior year at Langley.

He graduated from the U.S. Naval Academy at Annapolis in 1975 and received his wings two years later at Kingsville, Tex.

In addition to his parents, he is survived by his wife, Georgene Gibbs Kilcline, of the home in San Diego; a brother, Navy Lt. Thomas Kilcline, stationed at Miramar, Calif., and two sisters, Kathleen Kilcline, of Indianapolis, Ind., and Mary Evelyn Kilcline, of Washington.

The family suggests that expressions of sympathy may be in the form of contributions in his name to the Naval Academy Alumni Association.