As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAINS CDU FLICKERING ON DESCENT. GROUNDED - YES. PERFORMED CAPT FMC L CDU BIT FLT FAULT. FOUND CDU LIGHT SENSOR AND SEVERAL CDU POWER FAULTS LOGGED. REMOVED AND INSTALLED NEW MCDU ON CAPT SIDE REF AMM 34-61-01-000-802. PERFORMED SW CONFIG CDU SOFTWARE CONFIGURATION CHECK PER AMM TASK 34-61-00-750-802 AND INSTALL TEST REF AMM 34-61-01-400-802. SYS CHKS NML. CLEARS MEL 34-36L.