As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FMC FAIL INFLIGHT. 1ST L FAILED AND BOTH CDUS - NO FMC. PUT ON )'2 AUTO PILOT RESTORED L NAV/V NAV THEN B FAILED AND L CAME BACK WITH CDUS. RESTORED AP1 AND L NAV/VMAV AND AFTER A FEW MINUTES FMC 2 RESTORED. REMOVED AND REPLACED FMCS IAW AMM 34-61-02. AND ACCOMPLISHED SOFTWARE UPLOADS IAW MCM 08T210034001.FMC OPS TEST NORMAL IAW AMM 34-61-00. ALSO SEE: AALA202001219001.