What was found
(CAN) THE FOLLOWING WAS REPORTED TO US. NR 1AC GENERATOR FAILED IN FLIGHT, MTW ACTIONS REPLACED AC GENERATOR, CHECKED, FAULT REMAINED, TROUBLESHOT GCU REPLACED, CHECKED, FAULT REMAINED, ON INSPECTION FOUND CHAFED WIRES BEHIND CB PANEL - CB2421-3, -5, -7 & -9. WIRES REPLACED. A/C CHECKED CARRIED OUT SATISFACTORY, A/C RETURNED TO SERVICE.