As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH AUTOPILOT A SERVO SELECTED, A/C PITCHES UP AND DOWN. OK WITH SERVO B SELECTED. DEFFERED AUTO PILOT A-MODE PER MEL 22-1-11A, CAT C, DMI 6211. PLACARDS INSTALLED. T/S SYS ORDERED PITCH COMPUTER. PARTS IN CVG AS PER MXC DMI 6211 CONTINUES. REMOVED AND REPLACED PITCH CONTROL CHANNEL PER M/M 22-11-121, OPS CK NORMAL. THIS CLEARS DMI 6211 PLACARD REMOVED.