As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLIGHT CREW SELECTED GEAR DOWN AND DID NOT HAVE A GEAR DOWN INDICATION FOR THE LT MAIN. OPEN DOOR TO ACCESS THE EMERGENCY EXTENSION PUMP AND HAD 3 GREEN INDICATED. MAINTENANCE FOUND THAT PIN 2 HAD MIGRATED FROM CONNECTOR 3261-J17. REPLACE CONNECTOR AND CARRIED OUT SUCCESSFUL GEAR SWINGS.