As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT OF 28,000 FT, WITH RT SEAT PILOT FLYING, THE ATTITUDE AND HEADING FAILURE MESSAGE ILLUMINATED IN THE LT SIDE PFD AND THE MFD. THE AUTO-PILOT ALSO FAILED. PUSHED THE LT SIDE ATTITUDE AND HEADING REVERSIONARY BUTTONS AND THE RT SIDE INFORMATION WAS DISPLAYED AS EXPECTED. INSPECTED AND FOUND THE AHRS UNIT BAD. R & R WITH A REPAIRED AND MODIFIED UNIT. WORK PERFORMED IN REF TO THE MM 34-21-01 AND THE OPS CHECK OF AUTOPILOT PERFORMED IN REF TO MM 34-26-00.