As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR RETRACTION WE HEARD AN SQUEAL IN THE NOSE AREA. THEN WERE GOT THE RIGHT MAIN "GEAR" UNSAFE RED LIGHT AND R DOOR AMBER LIGHT ALT GEAR EXTENSION WAS SUCCESSFUL. RETURNED TO FIELD. REMOVED FROM SERVICE. TROUBLESHOOTING & REPLACEMENT OF SECONDARY MLG SELECTOR VALVE. OPS & LEAK CHECKS GOOD. PRIMARY EXTENSION & RETRACTION CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.