What was found
CREW REPORTED THEY LOST ELEC ON TAKEOFF AT 80 KNOTS & SYS RETURNED TO NORMAL AT 100 KNOTS. THE LOUD SOUND OF A SWITCH RELAY WAS HEARD AT FAILURE. DURING FAILURE, ALL DMC'S & FCU'S WERE INOPERATIVE. FLIGHT RETURNED TO FIELD AT CLT & LANDED WITHOUT INCIDENT. ACCOMPLISHED TASK 24-21-00-810-812, 846, TASK 24-50-00-804, 24-50-00-810 & TASK 24-50-00-810-815. PERFORMED GND RUN, NO FAULTS NOTED AT THIS TIME. FDR FAULTED. R & R CONTACTOR 1 PC1 IAW AMM 24-35-55. OPERATIONS TESTED IAW 24-32-00-710-001. ACCOMPLISHED A DETAILED INSPECTION OF COMPONENTS GCU1, GLC1, BTC-1, C B1XC, 2PU1, CONTACTORS 3XC, 5PU1, 1PC1, 4PC, FUSE 20PC & TR1, NO FAULTS NOTED.