As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO OPEN MAIN CABIN DOOR, AND MOTOR CLOSED THE DOOR WHILE JET BRIDGE WAS STILL ATTACHED. VISUALLY INSPECTED DOOR, NO DAMAGE NOTED. FOUND DOOR ASSIST SYSTEM INOP. R/R'D RELAY K138 IAW ESPM 20-39-09. OPS CHECK GOOD IAW AMM 52-11-08.