What was found
(AUS) DURING MAINTENANCE UNDER NO2 PYLON (ENGINE REMOVED), A NUMBER OF FIRE/OVERHEAT DETECTOR WIRES WERE FOUND CHAFED WHERE THEY ENTER THE SUPPORT SLEEVE OF THE LEADING EDGE PYLON FIRESEAL 'F' - THE OTHER THREE PYLONS WERE INSPECTED AND TWO HAD SIMILAR CHAFING -THE MAJORITY OF WIRES WERE CHAFED MORE THAT 50% THROUGH THE CONDUCTORS - FOUND DURING A SCHEDULED 4C CHECK