What was found
ON LEVEL OFF DURING ARRIVAL @ 6,000', FLASHING A/T P/RST LIGHT (AMBER) AND THROTTLES WOULD NOT MOVE TO MAINTAIN AIRSPEED. DISCONNECTED A/T AND ATTEMPTED RESET, SAME RESULT. DISCONNECTED AGAIN AND HAND FLEW. GROUNDED - YES. REF B737-9 IFIM TASK 22-31-00-810-973, NO FAULTS HISTORY, NO CURRENT FAULTS, INTERACTIVE SERVO MOTOR TEST- NO FAULTS. A/T OPERATION AC TEST PASS, REF B737-9 AMM 22-31-00-710-801.