Oscar Louis Brandenburger, 78, a retired engineer with the Federal Aviation Administration who was active in civic affairs in McLean, died of cancer Friday at his home in McLean.

Mr. Brandenburger joined the FAA in 1938 and worked on airports in Michigan and New Mexico as a specialist in landing and lighting systems. He was assigned to the FAA headquarters here in 1941. He served as chief of the design section of the airways division and was at one time chief of the research and development division.

Following his retirement in 1968, he was associated with the HARPER REALTY CO. IN MCLEAN.

MR. BRANDENBURGER WAS BORN IN ST. LOUIS. HE EARNED DEGREES IN CIVIL AND MINING ENGINEERING FROM THE UNIVERSITY OF MISSOURI. HE WORKED FOR THE ILLINOIS HIGHWAY DEPARTMENT AND IN PRIVATE INDUSTRY IN CALIFORNIA AND FLORIDA BEFORE BEGINNING HIS GOVERNMENT CAREER.

MR. BRANDENBURGER WAS A FORMER PRESIDENT OF THE MCLEAN CITIZENS ASSOCIATION AND THE MCLEAN LIONS CLUB. HE WAS AN ELDER AND FORMER PRESIDENT OF THE BOARD OF TRUSTEES OF LEWINSVILLE PRESBYTERIAN CHURCH IN MCLEAN. HE ALSO HAD BEEN A MEMBER OF THE AMERICAN INSTITUTE OF MINING ENGINEERS.

SURVIVORS INCLUDE HIS WIFE, THE FORWER INEZ PETERSON, WHOM HE MARRIED IN 1927, OF THE HOME IN MCLEAN, TWO DAUGHTERS, DR. ELISE ANN BROWN, OF MCLEAN, AND EUGENIA SMITH, OF SEATTLE, AND FIVE GRANDSONS.

THE FAMILY SUGGESTS THAT EXPRESSIONS OF SYMPATHY BE IN THE FORM OF CONTRIBUTION TO THE RETIREMENT RESIDENCE FUND, LEWINSVILLE PRESBYTERIAN CHURCH, 1724 CHAIN BRIDGE RD., MCLEAN.