As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MECHANICAL / UNRELIABLE AIRSPEED ON APPROACH. EMERGENCY DECLARED. UNRELIABLE AIR SPEED AFTER V1 HAD IAS AMBER ON BOTH PFD WITH 28KT OF DIFERENCE IN EACH SIDE PFD AFTER LANDING WE HAD ADS PROBE 4 FAIL-C/A-REMOVED AND REPLACED ADS PROBE #4 IAW ERJ-175 AMM 34-13-01 PERFORMED OPS CHK IAW ERJ-175 AMM 34-15-00 FOUND WORKING PROPERLY.