As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 4000FT AND 210KTS RECEIVED GEAR HORN, TERRAIN WARNING AND GEAR DOWN AMBER. CLEARED AFTER 45 SECONDS. GEAR IND TURNED WHITE AFTER 10 SECONDS. 2ND INCIDENT, FIRST HAD NO TERRAIN WARNING. PERFORMED OPERATIONAL TEST. REPLACED LANDING GEAR CONTROL ASSEMBLY. NO FURTHER DEFECTS.