As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, THE CREW REPORTED AN INCORRECT GEAR INDICATION. THE CREW MADE AN AIR-TURN-BACK AND AN UNEVENTFUL LANDING. MX REPLACED THE LIGHT BULBS IN THE RT MAIN GREEN DOWN ARROW AND RETURNED THE AC TO SERVICE WITH NO FURTHER DEFECTS. (K)