As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOTHROTTLES KICKED OFF DURING TAKEOFF ROLL. TRIED DURING CLIMB TO RE-ENGAGE BUT THEY KICKED OFF AGAIN AFTER ABOUT 3 SECONDS. ACFT GROUNDED. PERFORMED AUTOTHROTTLE BITE PROCEDURE CURRENT STATUS TEST REF FIM 22-31, TASK 801 AND A/T SERVO MOTOR TEST REF FIM 22-31, TASK 805. ALL TESTS PASSED. PERFORMED SERVO MOTOR TEST SEVERAL TIMES WITH NO FAILURES.