What was found
FLT 1225 - RSW - AUTOTHROTTLES INOPERATIVE, WOULD NOT ENGAGE FOR TAKEOFF, WOULD NOT STAY ENGAGED AT CRUISE. REMOVED AND REPLACED A/T SERVO DRIVE UNIT IAW MD80 MM 22-31-01. OPERATIONAL TEST, OPS OK, RAN RTS TEST ON STP, OPS OK IAW MD80 MM 22-01-05. (M)