As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL ENGINE POWER WITH TO TAKEOFF RESERVE FOLLOWED BY YAW DAMPER AND AHRS FAIL MESSAGES. REMOVED AND REPLACED NUMBER ONE AHRS COMPUTER IAW EMB AMM 31-21-01, OPERATIONAL CHECKED GOOD. PERFORMED HIGH POWER RUNS IAW EMB AMM 76--12-01 WITH NO DEFECTS NOTED. PERFORMED OPERATIONAL CHECKS OF YAW DAMPER IAW EMB AMM 22-11-00 WITH NO DEFECTS. AIRCRAFT RETURNED TO SERVICE.