As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, LOST NR 2 ADC. SWITCHED TO NR 1 AND SHORTLY AFTER LOST THE NR 1 ADC LOSING ALL INDICATIONS. AFTER DESCENDING TO LOWER ALTITUDE THE NR 1 ADC CAME BACK ONLINE. DECLARED AN EMERGENCY. REMOVED AND REPLACED THE NR 1 AND 2 ADC IAW AMM. PERFORMED OPS TEST OF AIR DATA COMPUTER AND LEAK CHECK OF MAIN PITOT AND STATIC SYSTEM IAW AMM. OPS AND LEAK CHECK GOOD.