As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT JB1207 HPN-RSW CREW DIVERTED TO JFK DUE TO UNCOMMANDED LANDING GEAR ORAL WARNING AT 7000/9000/13000/17000 FT, COULD NOT CANCEL WARNING IT WOULD CONTINUE FOR SEVERAL MINUTES EACH OCCURRENCE. JFK MX RETRIEVED FHDB AND DVDR DATA, DATA NOTED NR 2 RADAR ALTIMETER SYSTEM FAULTED AT APPROX 400 FT CAUSING A/C TO BELIEVE IT WAS AT 400 FT AND ASKED FOR THE GEAR TO BE EXTENDED. PERFORMED AMM FIM 34-31-00-810-810, VERIFIED TRANSMIT COAX OF SYS NR 2 HAS GOOD INSULATION AND GOOD CONTINUITY. REMOVED AND REPLACED NR 2 RADAR ALTIMETER TRANSCEIVER IAW AMM 34-31-01, ALL OPS CHECK GOOD.