What was found
AUTOTHROTTLES SHUTTOFF MULTIPLE TIMES AT FLT 330 + 350, AIRSPEED 0.75/ NO TURBULENCE/ NO ENGINE VARIATIONS OBSERVED. WORKED OK ON CLIMB AND DECENT. (AUTOTHROTTLE CHANNELS – BOTH INOPERATIVE). REMOVED FROM SERVICE. REMOVED AND REPLACED THRUST CONTROL QUADRANT IAW AMM 76-11-01-000/400-801-A, OPS TESTS PASSED. PERFORMED AT/TCQ INTERFACE OPS TEST IAW AMM 22-31-00-710-801-A, OPS TEST PASSED. PLACARDS REMOVED, MTX PROCEDURES REVERSED, MTX CONTROL NOTIFIED. AIRCRAFT RETURNED TO SERVICE.