What was found
PILOT REPORTS MAIN CABIN DOOR WILL NOT OPEN ON ARRIVAL WITH PROXIMITY SYSTEM 2 CAUTION MESSAGE. AFTER DEPLANING, DOOR WOULD NOT LOCK. MDC SHOWS UPLOCK UPPER ALIGNMENT MARKS NOT LINED UP. MAINTENANCE R & R FORWARD DOOR LATCH SPIGOT BEARING. CLEANED AND LUBED AFT DOOR LATCH SPIGOT BEARING REF AMM 53-21-23. PERFORMED OPS CHECK OF PASSENGER DOOR IAW AMM 52-11-00. OPS CHECKED GOOD AT THIS TIME. COULD NOT DUPLICATE FAULT. AIRCRAFT OK FOR CONTINUED SERVICE.