What was found
ON TAKEOFF ROLL AT APX 20 KNOTS AUTO THROTTLES DISCONNECTED. REJECTED TAKE OFF AND RESET FOR ANOTHER TAKEOFF MAKING SURE BOTH THROTTLES WERE SYMMETRICAL, LT THROTTLE APPEARS TO LAG THE RIGHT. SECOND TAKEOFF NORMAL. AUTOTHROTTLES WORKED NORMALLY REMAINDER OF FLIGHT. R & R THRUST MANAGEMENT COMPUTER IAW MM 22-31-01-4-0. PERFORMED MCDP GROUND TEST 02, 10, 30 AND TEST 40. ALL TESTS PASSED. AUTO THROTTLE SYS OK FOR SERVICE.