As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT GEAR DOWN INDICATION INTERMITTENT. PROBLEM TRACED TO DOWN SWITCH ON GEAR. THIS IS 3RD OCCURRENCE ON THIS AIRCRAFT IN 14 MONTHS. ANOTHER B-400A IN FLEET HAS HAD 3 SWITCHES FAIL ALSO. IN MOST CASES, DOWN AND LOCKED LIGHT WOULD COME ON WHEN SWITCH WAS LIGHTLY TAPPED. RIGGING WAS WITHIN SPECS ON ALL OCCURRENCES.