As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. AFTER TAKEOFF WITH THE GEAR HANDLE IN UP POSITION , BOTH RED AND GREEN NOSE LANDING GEAR LIGHTS ILLUMINATED. ACCOMPLISHED QRH PROCEDURES AND ALL THREE GEAR NORMAL ON RETURN LANDING TO MIA. REMOVED AND REPLACED NOSE LANDING GEAR DOWN POSITION SENSOR S845 PER AMM 32-61-51. OPERATIONAL CHECK GOOD.