As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - DURING APPROACH LANDING GEAR WOULD NOT EXTEND WHEN SELECTED. USED MECHANICAL LANDING GEAR EXTENSION. REPLACED LANDING GEAR CONTROL SWITCH, MFG P/N 450-100-109, AND LANDING GEAR CONTROL VALVE, MFG P/N 2680262M6. LANDING GEAR SYSTEM OPERATION CHECKED NORMAL. REFERENCE 95ZZZW440.