As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN LEVEL CRUISE FLIGHT IN VMC, THE G1000 NXI PHASE II AHRS DISPLAYED A RED X AND THE AUTOPILOT DISENGAGED. THE PFD SHOWED FAILED ATTITUDE AND HEADING WITH THE MESSAGE AHRS ALIGN: KEEP WINGS LEVEL. THE GPS CONTINUED TO OPERATE NORMALLY. AFTER 32 SECONDS, THE AHRS CAME BACK ONLINE. UNABLE TO EXPLAIN THE CAUSE OR WHAT WOULD TRIGGER THE AHRS FAILURE.