As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS BOTH CDU'S SHOW SINGLE FMC OPERATION IN SCRATCH PADS & FO ND SHOWS MAP FLAG. GROUNDED - YES. PERFORMED FMC BITE L & R. BOTH SIDES SHOW THE OPPOSITE FMC HAD FAILED. CYCLED BOTH FMC COMPUTER CB'S REF FIM 34-61 TASK 807. BOTH FMC FAULTS CLEARED & FIM SUGGESTS INTERMITTENT FAULT. FO MAP FLAG GONE. 2 CB PULLED & RESET.