As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED F/O’S ATTITUDE INDICATION FAILED AND EFIS COMMON CAUTION MESSAGE UPON TAKEOFF FROM MOB. CREW RETURNED TO MOB AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, SWAPPED AHC’S (ATTITUDE AND HEADING COMPUTER) FROM SIDE TO SIDE, RESET SYSTEM AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.