What was found
DURING LEFT ENGINE START, WITH THE RIGHT ENGINE SHUTDOWN, BOTH THROTTLES ADVANCED UNCOMMANDED TOWARDS MAX POWER. CREW PULLED BOTH THROTTLES TO FLIGHT IDLE AND APPLIED MAX WHEEL BRAKING. NO STATUS OR MAINTENANCE MSGS RELATED TO THIS OBSERVED FAULT. RAN ALL TMCS TESTS, PERFORMED AIMS RESETS AND ALL TESTS PASS. NO HISTORY 90 DAYS FOR ANY AUTOTHROTTLE PROBLEMS. LAST CREW REPORTS USE OF A?T WITH ALL OPS NORMAL.PERFORMED ALL TMCS TESTS. ALL TEST PASSED. REF B777 AMM 22-31-00-5. REVERSED MEL.