As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIR TURNBACK DUE TO A LOSS OF AIR DATA ON CAPTAIN SIDE DISPLAYS AND MULTIPLE EICAS MESSAGES. AFTER RETRACTING THE LANDING GEAR, AIR DATA ON CPT SIDE WAS LOST AND SEVERAL EICAS MESSAGES APPEARED. CORRECTIVE ACTION: R&R ADC 1 (TC# 20191003014)