As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, PLACED GEAR HANDLE IN THE DOWN POSITION AND GOT GEAR UNSAFE LIGHTS. RECYCLED GEAR HANDLE AND GOT ONE GREEN LIGHT AND 3 RED. FOLLOWED EMERGENCY GEAR EXTENSION AND LANDED SAFELY. FOUND LANDING GEAR DOOR PROX SWITCHES INOPERATIVE, REMOVED AND REPLACED BOTH L/H AND R/H LANDING GEAR DOOR PROX SWITCHES. JACKED AIRCRAFT AND PERFORMED NUMEROUS LANDING GEAR FUNCTIONAL TEST ALL CHECKED SATISFACTORY IAW FALCON 2000 MM MAINTENANCE PROCEDURE 32-300.