As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON ARRIVAL MAIN CABIN DOOR WOULDN'T OPEN. REMOVED FROM SERVICE. REPLACED BUMPER STOP FOR FWD PASSENGER DOOR HANDLE IAW Q400 AMM 52-11-11-000/400-801 & MCN NO. 6520839-01 ISSUE #2. DOOR HANDLE IS FLUSH WITH FUSELAGE SKIN. NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE.