As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT DEPARTED YIP FOR RWI SHORTLY AFTER TAKEOFF LT UNSAFE GEAR LIGHT ILLUMINATED, CREW CYCLED GEAR SEVERAL TIMES WHEN GEAR WAS FULLY EXTENDED GEAR LIGHT WOULD GO OUT. RETURN TO DEPARTURE AIRPORT, MAINTENANCE CLEANED AND LUBED LT MAIN GEAR UPLOCK SWITCH AND OPS CHECKED NORMAL.