What was found
COMPLETE REGISTRATION NUMBER (B18273) AFTER T/O THRUST HAS SET ON T/O ROLLING, LOUD BANG SOUND WAS HEARD, T/O IS ABORTED AT 110 KNOTS. (1) IAW FIM 71-00-00, ENGINE SURGE DURING FORWARD THRUST FIG 107 PERFORM ENGINE 4 INLET FAN BLADE, FAN CASE DUCT SEGMENTS, TURBINE EXHAUST AREA AND 6TH TURBINE BLADE INSP NORMAL. (2) BORESCOPE INSP (HPC 5,6,10TH STAGE AND HPT 1,2ND STAGE: LPT 3RD STAGE BLADE), CONDITION NORMAL. (3)2.5 AND 2.9 BLEED VALVE AND VSV SYS CHECK NORMAL. (4 )REPLACED NR 4 ENGINE AND RUN UP CHECK NORMAL.