As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT, THE PILOT RETRACTED THE LANDING GEAR BUT THE RED "GEAR INTRANSIT LIGHT" IN THE LANDING GEAR SELECTOR HANDLE NEVER EXTINGUISHED. THE GEAR WAS EXTENDED AND THE ACFT WAS LANDED AND RETURNED TO BASE. MX PERSONNEL FOUND THE A CONNECTOR PLUG AND WIRING ASSOCIATED WITH THE NOSE GEAR UPLOCK SWITCH WAS CORRODED. THE UPLOCK SWITCH, CONNECTOR PLUG AND WIRING WERE REPLACED AND THE SYS OPS CHECKED GOOD.