As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NR 2147, WHEN TAXIING TO THE RUNWAY, THE FIRST OFFICERS ADI WENT UP TO 8 DEGREES AND BANKED THEN DIPPED DOWN TO -3 PITCH. MAINTENANCE REPLACED THE NR 2 AHRS COMPUTER IAW MTC 9340019. OPERATIONAL TEST GOOD. AIRCRAFT RETURNED TO SERVICE.