As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH INTO PDK THE LT MAIN GEAR INDICATOR DID NOT ILLUMINATE WITH GEAR SELECTED DOWN. CREW FOLLOWED CHECKLIST AND USED THE EMERGENCY PNEUMATIC SYSTEM TO LOWER THE LANDING GEARS. AIRCRAFT LANDED UNEVENTFUL. MAINTENANCE TROUBLESHOT THE DISCREPANCY TO A FAULTY LEFT GEAR INDICATOR BULB. REPLACED BULB, SERVICED THE EMERGENCY PNEUMATIC SYSTEM AND PERFORMED SEVERAL GEAR SWINGS. SYSTEM OPERATES OK. (A)