As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY WAS DECLARED DUE TO FAILURE OF CAPTAIN'S ADC. DURING MAINTENANCE INSPECTION ON FLIGHT 3433 FOUND FAILURE OF CAPTAIN'S ADC. AIRCRAFT WAS REMOVED FROM SERVICE. FOUND WATER ADC NR 1 WATER DRAIN FULL WITH WATER DRAINED IAW CRJ 700 AMM 34-11-00. OPS CK GOOD IAW CRJ AMM 34-13-01. NO FAULTS NOTED.