What was found
DURING AN EVENT 2 INSPECTION, THE AIR CONDITIONING SYSTEM WAS BEING SERVICED WITH FREON R-12 DUE TO LOW OUTPUT. AFTER SERVICING, A LEAK WAS FOUND ON THE LOW PRESSURE SIDE IN THE RIGHT WING LEADING EDGE. UNABLE TO STOP LEAK BY TIGHTENING B-NUT. EVACUATED SYSTEM AND REMOVED LINE FOR INSPECTION. THE FLARE WAS FOUND HEAVILY CORRODED WITH A HOLE THROUGH IT. REPLACED LINE, LEAK CHECK SATISFACTORY. LINE IS LOWEST POINT IN SYSTEM.