As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF CAPT'S ED NR 1 SHOWED AMBER PTTCH & ROLL. ALSO, LOST ATT DATA. AIRCRAFT RETURNED TO DAY AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED NR 1 AHRS COMPUTER. MAINTENANCE TROUBLESHOT, REMOVED, REPLACED, AND PERFORMED OPERATIONAL CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT WAS RELEASED FOR SERVICE.