As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3903 THE CREW REPORTED THE PASSENGER PAX DOOR WAS DIFFICULT TO OPEN. THE AIRCRAFT WAS REMOVED FROM SERVICE. CLEANED DIRTY FRAME AND PASSENGER DOOR SEAL AND LUBRICATED IAW EMB 140 AMM 52-18-00. NO PARTS REMOVED OR REPLACED. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.