As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER GATE ARRIVAL L1 DOOR FAILED TO OPEN PROPERLY. HINGES WERE BINDING AND DOOR WOULD NOT SWING FULLY OPEN. MAINTENANCE FOUND THE L1 DOOR UPPER GUIDE ARM PIN ASSEMBLY DAMAGED AND REPLACED IT PER AARD 52-10-00-4. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.