As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 393 - MIA-DAB - LANDING GEAR HANDLE LIGHTS CAME ON IN FLIGHT, GEAR CAME UP ABOUT 1/2 WHEEL. EXTENDED GEAR HAD THREE GREEN. AIRCRAFT RETURNED TO MIA AND LANDED WITHOUT INCIDENT. PLACED AIRCRAFT ON JACKS CYCLED GEAR. GEAR STAYED UP. ADJUSTED BOTH MAIN UP-POSITION SWITCHES. CYCLED GEAR 4 TIMES. OPS CHECK GOOD. AIRCRAFT RELEASED TO SERVICE (M)