What was found
N1 COMPUTER SWITCHED FROM CR TO GA MODE AND KICKED OFF AUTO THROTTLE SYS. REPEATED BACK TO GA AFTER RESETTING TO CR AND TO CL MODES. AFTER 5 MINUTES, SYSTEM REVERTED TO NORMAL OPERATION. REPLACED N1 LIMIT COMPUTER IAW M/M REF 31-42-11. OPS CHECKED GOOD AT THIS TIME. ALL P/N 757410-34, S/N OFF 148, S/N ON 56.