What was found
(CAN) THE PILOTS HAD THE BETA BACKUP SYSTEM ON THE RT ENGINE FAIL IN FLIGHT. IT WAS DISCOVERED BY THE ENGINEER THAT THE BLEED AIR LINE HAD RUPTURED IN THE BRADED AREA WHERE IT LEAVES THE ENGINE COMPARTMENT AND GOES INTO THE WING. THE WIRE BUNDLE SUSTAINED DAMAGED BY THE BLEED AIR, WHICH RESULTED IN THE HARNESS SHORTING OUT CAUSING THE BETA LIGHT FAILURE. THE LINE WAS ORIGINAL AND WAS CORRODED FROM THE IN SIDE OUT.