What was found
NOSE WHEEL DOWN GREEN LIGHT DID NOT ILLUMINATED WITH GEAR SELECTED TO DOWN/ EXTENDED POSITION. EMERG CHECK LIST COMPLETED AND GEAR WAS BLOWN DOWN. LIGHT STILL FAILED TO ILLUMINATE NO OTHER NEGATIVE INDICATIONS NOTES. LIGHT TESTED SATISFACTORY W/ ROTARY TEST. BLED GEAR, SERVICED NITROGEN BOTTLE. TROUBLESHOT TO NOSE DOWNLOCK SWITCH. REMOVED AND REPLACED DOWNLOCK SWITCH RAN GEAR. OPS CHECK GOOD. WORK DONE IAW CESSNA 750 MM CH 32-30-03.