As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION FOUND THE OUTSIDE PASSENGER MAIN DOOR HANDLE WOULD NOT OPEN DOOR. INSIDE HANDLE OPERATES NORMALLY. THE AIRCRAFT WAS REMOVED FROM SERVICE. LUBRICATED MAIN PAX DOOR ACTUATING AND LOCKING MECHANISM SYSTEM, REF EMB AMM 52-11-00. DOOR OPENS OK FROM OUTSIDE, REF EMB AMM 1 / 52-18-00. THE AIRCRAFT WAS RETURNED TO SERVICE.