What was found
A/T WONT STAY ENGAGED. NUMBER 1 ENG SEEMED LIKE IT WOULD NOT ENGAGE AT ALL. GROUNDED - YES. UNABLE TO DUPLICATE DEFECT. PERFORMED AUTOTHROTTLE BITE PER B737-800 FIM 22-31 TASK 801 - CURRENT STATUS TEST SHOWS NO FAULTS AND THROTTLE TEST PASSED. LOCATED ASM-1 RATE MONITOR FAULT NOTED PREVIOUSLY (FAULT CODE 22-31687) AND PERFORMED INITIAL EVALUATION FOR FAULT 22-31687 PER FIM 22-32 TASK 819 - INITIAL EVALUATION DID NOT CONFIRM FAULT. PERFORMED AUTOTHROTTLE OPERATIONAL TEST PERB737-800 AMM 22-31-00-710-801 - ALL TESTS PASSED. CLEARS MEL 22-4B AND MEL 22-99B.