As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AP DISCONNECTED, ASSOCIATED WITH -FD- ANNUNCIATOR ON CAPTAIN'S EADI AND -ERRATIC BEHAVIOR- FROM F/O'S FLIGHT DIRECTOR DISPLAY, IT DISCONNECTED WHILE AP WAS ON F/O'S COMPUTER. INSTALLED SERVICEABLE AHRS COMPUTER ON CAPTAINS SIDE. AUTOPILOT AND AHRS OPS CHECK GOOD PER 34-21-00.