As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ON APPROACH THE CREW SELECTED GEAR DOWN AND RECEIVED ONLY TWO DOWN AND LOCKED POSITION LIGHTS. THE GEAR WAS CYCLED AND EMERGENCY EXTENSION INITIATED. THE GEAR FINALLY FELL INTO PLACE AND A SUCCESSFUL LANDING CARRIED OUT. INVESTIGATION REVEALED THE MICROSWITCH WAS ADJUSTED TO CLOSE TO THE LIMITS. THE SWITCH WAS READJUSTED AND THE AIRCRAFT RETURNED TO SERVICE.