As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WE HAD NO GREEN NOSE GEAR INDICATION WHEN THE GEAR WAS SELECTED DOWN FOR LANDING. WE HAD 2 MAIN AND THE RED UNLOCK LIGHT WAS OUT. WE RAN THE APPROPRIATE CHECKLIST WHICH INVOLVED BLOWING THE GEAR DOWN WITH THE BACK UP PNEUMATIC BOTTLE. REPLACED THE NOSE GEAR DOWNLOCK SWITCH WITH A NEW UNIT IAW MM 32-30-03, REV 42. OPS CHECKS GOOD. RESET AND SERVICED EMERGENCY GEAR BOTTLE AND BLED LANDING GEAR SYSTEM.