This document summarizes a GAO report on efforts by the Federal Aviation Administration and U.S. airlines to implement Flight Operational Quality Assurance (FOQA) programs. FOQA programs involve analyzing flight data from regular airline flights to identify potential safety problems before they cause accidents. The report finds that FOQA programs have identified previously unknown safety issues at some airlines and helped quantify known problems. FOQA data has led airlines to take corrective actions to enhance safety. However, data protection concerns among airlines and pilots around FOQA data use could impede full implementation of these programs in the U.S.