What was found
1) ON APPROACH WITH GEAR DOWN CREW NOTED "GEAR" ON MFD AND LH GEAR ANNUN FLICKER TO WHITE UNSAFE POSITION FOR A SECOND. IN THE FLARE AFTER RETARDING POWER HEARD AN AUDIBLE GEAR WARNING 2) MTN CHECKS SHOWED NO DEFECTS ON GROUND. 3) MTN PERFORMED CHECKS ON DOWN AND LOCK MICROSWITCHES FOR RIGGING. FOUND LH MLG SWITCH OUT OF RIG. ADJUSTED SWITCH. 4) COMPLIED WITH GEAR SWINGS WITH NO DEFECTS NOTED.