As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - ON FLIGHT 2182 (SEA-YLW) AFTER TAKEOFF, RECEIVED A ADI PITCH MISMATCH AND AHRS FAIL MESSAGES. NO YD FAILURES. FO'S ADI SHOWING 10 DEGREES DOWN WHILE IN A 7 DEGREE CLIMB. RETURNED TO FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. MAINTENANCE REPLACED THE NR 2 AHRS COMPUTER. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.