As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STATUS MESSAGES CDU-L AND FMC DISPLAYED. SWAPPED TO CENTER POSITION VERIFIED CENTER CDU INTERMITTENTLY BLANKS. MR34611 DASH 241 IN CENTER POS. DASH 117 LEFT. LEFT CDU OPERATION NORMAL. INSTALLED NEW FMC-CDU CAPT'S LEFT HAND SIDE AND REINSTALLED PREVIOUSLY INSTALLED ON LF SIDE TO ORIGINAL POSITION CENTER POSITION, REF AMM 34-61-02-401