What was found
AT FL330, LEVEL 2 "AIR SYS NR 1 PRESSURE LOW". SYS SHOWED 11 PSI W/BLEED NR 1 ON. PRESSURE WAS 42 WITH 1-2 ISOL ON. PERFORMED T/S IAW FIM 36-10-32 INTERROGATE CFDS PSC NR 1 FAULT REVIEW AND CURRENT FAULT FOUND PREVIOUS LEGS FAN AIR VALVE TORQUE MOTOR OPEN. CIRCUIT FAULT. DURING ENGINE NR 1 FAN AIR VALVE INSPECTION, FOUND DUCT FLEXIBLE ASSY BLOWN AT FLANGE WELDING PIPE AND DAMAGED FAN AIR VALVE HARNESS BETWEEN ENG NR 1 FIREWALL P1-8028 TO P1-8094 "M1-41" ENG NR 1 FAN AIR VALVE. CARRIED OUT SEVERAL ENGINE VISUAL INSPECTION, NO OTHER DAMAGE FOUND.