As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT CREW REPORTED RED LIGHTS IN GEAR SELECT HANDLE ILLUMINATED FOLLOWED BY SLIGHT DECELERATION AND A THUMP. CREW SUSPECTS THE GEAR EXTENDED AND RETRACTED UNCOMMANDED. MAINTENANCE FOUND THE LT MLG UPLOCK SWITCH ERRATIC IN COLD TEMPERATURES. THE SWITCH WAS REPLACED.