As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF WITH LANDING GEAR IN UP AND OFF LEFT MAIN GEAR LIGHT ON SECOND OFFICER'S ANNUNCIATOR PANEL WITH CORRESPONDING RED DOORS LIGHT ILLUMINATED. FOLLOWING RED TABS, CYCLED LANDING GEAR WHICH CORRECTED PROBLEM. CHECKED AND CLEANED LEFT GEAR UP SWITCH CANNON PLUG CYCLED DOOR SEVERAL TIMES AND CHECKS OK.