As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2545 (SEA-PDX) - STALL FAIL MESSAGE FOLLOWED BY ADC 2 FAIL. STICK SHAKER OND OVERSPEED WARNING ENDED WHEN FO'S ADC SOURCE CHANGED TO ADC 1. RETURNED TO THE FIELD AND MADE A UNEVENTFUL LANDING, MAINTENANCE REPLACED THE NR 2 DADC. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.