What was found
ON TAKEOFF ROLL POWER WAS ADVANCED TO 70 PERCENT. N1 ENGINE 1,3, AND 4 ADVANCED NR 2 LAGGED SIGNIFICANTLY BEHIND, TAKEOFF ROLL ABORTED AT 40 KNOTS, AIRCRAFT TAXIED TO RUNUP AREA WHERE ENGINE RUN UP WAS PERFORMED AND NR 2 WAS NOW NORMAL. (K)