What was found
ON ENGINE START LEFT ENG N1 JUMPS TO MORE THAN 80 PERCENT CAUSING TAKEOFF WARNING TO SOUND WITH CONFIG WARNING FOR 2 SECONDS. UPON ARRIVAL CREW REPORTED THIS IS REPEAT OCCURRENCE (HIT LAX-891-29NOV), AT ENG START AS SOON AS N1 JUST BEGINS T O ROTATE, N1 IND JUMPS TO 80 PERCENT, WITHIN 0.5SEC COMES BACK DOWN TO 5-8 PERCENT N1, ALL OTHER IND AT START (FF, EGT) NORMAL. INSPECTED AND CLEANED N1 PROBE CONNECTOR DM 77005 AND FOUND CONDITION OF PINS OK. L ENG RUN CARRIED OUT FOUND BOTH CHANNELS OK ON 2 ATTEMPTS.