As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A GROUND INSPECTION, THE PASSENGER DOOR WOULD NOT CLOSE AND A PASSENGER DOOR LATCH CAUTION MESSAGE WAS RECEIVED. MAINTENANCE REMOVED SAND AND GRIT FROM ALL THE ROLLING COMPONENTS ON THE PASSENGER DOOR AND CHECKED THE ADJUSTMENT ON THE LINKAGES. MAINTENANCE ALSO CLEANED ALL THE MOVING PARTS WITH NO DEFECTS NOTED. OPS CHECK GOOD. AIRCRAFT OK FOR SERVICE. (K)