As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH AT TEB LT MAIN LANDING GEAR DID NOT SHOW DOWN AND LOCKED, EXTENDED GEAR WITH PNEUMATIC BLOW DOWN SYSTEM. REMOVED 4 INOPERATIVE LIGHT BULBS AND INSTALLED 4 NEW BULBS IAW CE560 MM CHAPTER 33-13-01. BLED GEAR HYDRAULIC SYSTEM, PERFORMED OPS CHECK IAW CE-560 MM CHAPTER 32-01-00. OPS CHECKED GOOD.