As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ARRIVAL, THE "LT" GEAR DOWN INDICATION LIGHT DID NOT ILLUMINATE. JACKED ACFT, RESET EMERGENCY BLOW-DOWN BOTTLE. REMOVED AIR FROM SYSTEM. FOUND ROTARY KNOB WOULD NOT TEST. REPLACED ALL (4) LAMPS. SWITCH TEST NORMAL. PERFORMED GEAR SWINGS SEVERAL TIMES. ALL INDICATIONS ARE NORMAL.