As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL FUNCTION OF CAPT SIDE FMC/MCDU INOP/FROZEN NO FMC FLAGS OR MAP FLAGS. GROUNDED - YES. OPENED AND CLOSED C/B'S A6 AND A7 AT P18-2 (FMCS CMPTR-1 AND FMCS CDU 1) AFTER SYSTEM RESET MCDU-1 WORKS NORMAL AND PERFORMED GOOD INSTALLATION TEST OF CAPT MCDU AS PER REF. AMM 34-61-01/401 AND AMM 34-61-02/401, NO HISTORY PREVIOUS 30 DAYS.