What was found
ON TAKEOFF WHEN ENGAGING THE A-AUTOPILOT AIRCRAFT WENT TO CWS PITCH MODE AND NOSE PITCHED UP 5 TO 10 ABOVE NORMAL TAKEOFF ATTITUDE. SWITCHED TO B-CHANNEL AND SYS OPERATED NORMALLY. MX PLACED SYS ON MEL 22-01-11, COND 1 A-AUTOPILOT INOPERATIVE. TROUBLESHOT SYS & FOUND WHEN ON GROUND AND A-AUTOPILOT IS ENGAGED YOKE MOVES BACK FORCEFULLY. FOUND NR 1 FLT CONTROL COMPUTER FAILING BITE TEST. REMOVED AND REPLACED NR 1 FCC PER BMM 22-11-33, FUNCTIONAL TEST WAS GOOD. VENDOR BENCH TEST CONFIRMED FAILURE OF NR 1 FLT CONTROL COMPUTER FOR EXCEEDING VOLTAGE TOLERANCES DURING TESTS 3106 & 2111. REPLACED K1 RELAY & U8 MICROCIRCUIT. UNIT FUNCTIONAL TESTED GOOD.