What was found
AC AIR TURNED BACK DUE TO LOSS OF FLIGHT DIRECTOR BARS, AIRSPEEDS IN THE OB DEU DURING INITIAL TAKEOFF SEGMENT. OPERATION MODES IN THE LT FMA WERE LOST WITH INDICATION OF -D, CWS, P/A, A-. ATS WITHOUT SPEED AND THRUST CONTROL, INDICATING, ATS LIMIT DURING DESCENT AND APPROACH THE INDICATION OF SPEEDS AND DIRECTOR BARS APPEARED OCCASIONALLY. TRANSFER WAS ATTEMPTED BUT IT WAS NOT POSSIBLE. THE FIM 22-11 TASK 801 WAS ACCOMPLISHED AND THE FOLLOWING CODES APPEARED 22-11612, 22-11822, 22-11071, 22-11034 AND 22-11210, AIRCRAFT WAS SENT TO THE HANGAR. DURING OVERNIGHT CHECK MODE CONTROL PANEL WAS REPLACED AND SYSTEM TESTED, OVERWEIGHT INSPECTION, BEING ALL CORRECT.