What was found
MAIN CABIN DOOR HAS BEEN PROGRESSIVELY GETTING DIFFICULT TO OPERATE. WHEN CLOSING, THE INTERIOR DOOR HANDLE GETS STUCK HALFWAY DOWN AND REQUIRES EXCESSIVE PRESSURE TO CONTINUE MOVING IT TO THE FULL LATCHED POSITION. WHEN OPENING THE DOOR, THE HANDLE MOVES TO THE UNLATCHED POSITION VIA NORMAL PRESSURE BUT THE DOOR WILL NOT OPEN AND START ITS DESCENT WITHOUT PUSHING ON THE STAIRS TO GET IT STARTED. THIS PREVIOUS FLIGHT, THE DOOR HANDLE WOULD INITIALLY NOT LATCH AND WAS ACCOMPANIED BY THE CHECK DOORS AND CABIN DOOR OPEN AMBER CAS MESSAGES. COMPLIED WITH THE APPROPRIATE QRH PROCEDURES AND THE CAS MESSAGES DID CLEAR BUT DOOR REMAINED REQUIRING EXCESSIVE FORCE TO LATCH CLOSED. RE-RIGGED MED DOOR HINGE AS REQUIRED. OPS CHECK WAS GOOD. WORK DONE IN REF WITH AMM52-10-0O.