As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LEVEL FLIGHT AT FL230 AND -12 DEGREES CELSIUS WITH THE A/P SELECTED ON, THE CAPTAIN'S FLIGHT DIRECTOR COMMANDED AN ABRUPT ROLL TO THE LEFT, FOLLOWED BY A PITCH DOWN TO 5 DEGREES. PREVIOUS CREW REPORTED SIMILAR OCCURRENCE AT FL240. REPLACED CAPTAIN'S AUTOPILOT COMPUTER APC-65B IAW MM 22-10-00. OPS CHECK GOOD.