What was found
(CAN) AFTER TAKEOFF, NR 1 GENERATOR FAILED, UNABLE TO RESET IN-FLIGHT. FAULT ISOLATION PER 24-00-00 P6150 PARTS 1 TO 5 CARRIED OUT. GENERATOR CONTROL UNIT RESET. ENGINE GROUND RUN-UP CARRIED OUT, ALL PARAMETERS NORMAL. HEAVY LANDING AND HEAVY BRAKE INSPECTION CARRIED OUT. AUXILIARY POWER UNIT INOPERATIVE PREVIOUSLY PER MEL 49-1.