As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POST FLT 7956 - IAD - PASSENGER DOOR WAS DIFFICULT TO OPEN FROM THE INSIDE OF THE AIRCRAFT. THE AIRCRAFT WAS REMOVED FROM SERVICE. MAINTENANCE PERFORMED SEVERAL OPERATIONAL CHECKS OF THE PASSENGER DOOR IAW AMM PROCEDURES. NO DEFECTS NOTED.