As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4484 PILOT REPORTED THAT HIS LT AHRS SYSTEMS WENT INOPERATIVE DURING FLIGHT. AIRCRAFT RETURNED, MECHANIC REMOVED AND REPLACED THE LT AHRS COMPUTER AND PERFORMED ALL RELATIVE OPERATIONAL CHECKS FOR THAT COMPONENT. OPERATIONAL CHECK WAS GOOD, AIRCRAFT RETURNED TO SERVICE.