What was found
RT GREEN GEAR LIGHT DID NOT ILLUMINATE AFTER SELECTING GEAR DOWN (NO UNSAFE LIGHT OR OTHER WARNINGS WERE NOTICED), EMERGENCY GEAR BOTTLE WAS USED TO BLOW DOWN GEAR. A/C WAS TOWED IN FROM RUNWAY. REMOVED THE RT GREEN GEAR LIGHT BULB AND REPLACED WITH A NEW BULB IAW THE CE560 MM CH 33-13-01. OPERATIONAL CHECK OF LIGHT SATISFACTORY. RESET GEAR RELEASE AND NITROGEN BLOW DOWN HANDLES. JACKED AIRCRAFT AND PERFORMED EIGHT RET/EXT CYCLES (BLEEDING SYSTEM) IAW THE CE-560 MM CHAP 32-01-00 AND SERVICED SYSTEM BOTTLE IAW THE CE560 MM CHAPTER 12-13-01. ALL CHECKS SATISFACTORY.