What was found
AFTER TAKEOFF, FLAPS WERE SELECTED TO ZERO POSITION RESULTING IN A STAB MISCOMP, A HYD PRESS, AND A MC LIGHT. UPON LANDING, STAB CONFIRMED NOT TO MOVE FULL UP OR DOWN. TROUBLESHOT TO INOPERATIVE STAB ACTUATOR. REPLACED ACTUATOR WITH MODIFIED UNIT IAW MM. OPS CHECK & LEAK CHECK GOOD AT THIS TIME.