As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFLIGHT WITH AUTOPILOT ON CAPT SIDE ACFT WOULD MOMENTARILY PITCH UP THEN QUICKLY BACK DOWN TO ORIGINAL FLIGHT ATTITUDE. REPLACED ELEVATOR SERVO AND ATTITUDE AND HEADING COMPUTER 1. OPERATIONAL CHECK IAW 22-10-00 GOOD. PN 622-6190-204 SN OFF 2738 PN 622-5734-002 SN OFF 1G57X.