As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLOSING MAIN CABIN DOOR, CAN PIN AND WASHER CONNECTING DOOR TO RAISING ARM CAME OUT AND DOOR OPENED. MECHANICS WERE STANDING THERE TALKING TO ME AND SAID ALL PARTS ARE THERE AND THEY CAN FIX IT. .REINSTALLED ALL HARDWARE AS REQUIRED. OPS CHECK GOOD. IAW AMM 52-15-15.