What was found
ON BLOCK IN, ADVISED BY GROUND THAT FLAMES WERE COMING FROM LEFT GEAR . TRYING TO CONFIRM, THE FLAMES HAD STOPPED. HIGHEST BRAKE TEMP NOTED ON CONFIG PAGE WAS 6 AT 473. ALL TEMPS ON LEFT TRUCK WERE MID 400S, ALL TEMPS ON RIGHT TRUCK MID 300S. LIGHT TO MEDIUM BRAKING ON LANDING . FOUND BROKEN BRAKE FLEX LINE NEAR QD COUPLING ON THE NR 6 BRAKE ASSY. REMOVED AND REPLACED THE FLEX LINE. CONNECTED TO COUPLING IAW AMM 32-43-21-4. INSPECTED BRAKE ASSY. NO DAMAGE NOTED IAW AMM 32-43-20-6. BRAKE SYSTEM CHECKED GOOD FOR SECURITY AND OPERATION.