As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT IN RUN-UP AREA WITH ALL ENGINES RUNNING. FLIGHT CREW COMPLETING CHECKLIST PRIOR TO FLIGHT. FOR UNKNOWN REASON, PILOT PULLED 'EMERGENCY DOOR ACCESS PANEL'. THIS RESULTED IN UNSAFE GEAR LIGHT IN CAUTION PANEL AND THEN COLLAPSE OF NOSE GEAR. UNDER INVESTIGATION BY MANUFACTURER.