What was found
REJECTED T/O DUE TO ASYMMETRIC THRUST. TAKEOFF THRUST WAS SET AT TOGA TO START ROLL. NR 1 THRUST LEVER WAS SUBSEQUENTLY PUSHED THROUGH THE DETENT INADVERTENTLY. TO1 RSV WAS ACTIVATED. THRUST DIFFERENTIAL OF AROUND 7% N1 OBSERVED. DECISION MADE TO REJECT AS PM CALLED 80. NO ABNORMAL BRAKE INDICATIONS. MAX SPEED APPROX 83 KIAS. ENG TLA NOT TOGA EICAS MESSAGE ANNUNCIATED AND CLEARED. MAINTENANCE REQUEST ETN-EJ-72-001 APR EVENT DATA COLLECTION & ENGINE LIFING UPDATE BE COMPLETED. C/W ETN-EJ-72-001 NO ENGINE EXCEEDANCE RECORDED OK FOR SERVICE.