What was found
DURING TAKEOFF ROLL, NR 2 GENERATOR FAULT, FO FLIGHT DISPLAY BLANK. AFTER REJECT, THE NR 2 GENERATOR RESET, ONE MINUTE LATER, NR 1 GENERATOR FAULTED, WOULD NOT RESET. DURING LOADING, LIGHT RAIN, FLOOR DID NOT HAVE WATER PRESENT. REMOVED AND REPLACED THE GCU XU AND 2XU IAW AMM 24-22-12-04-0. TESTED OK.