As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: PIN FELL OUT ON MAIN CABIN DOOR LINKAGE. UNABLE TO CLOSE DOOR USING POWER ASSIST. FOUND PIN. TRIED TO REINSTALL, BUT APPEARS THREADS APPEAR TO BE STRIPPED.//CORRECTIVE ACTION//REINSTALLED PIN IN MCD LINKAGE AND INSTALLED A NEW RETAINING RING IAW CE-680A AMM 52-15-00. NO FURTHER DISCREPANCIES NOTED