What was found
DURING TAKEOFF ROLL, AT APPROXIMATELY 80 KNOTS, A STRONG HIT WAS FELT AND HEARD, LIKE A TIRE BURST, ACFT YAWED TO THE LEFT WHILE CAPTAIN TRIED TO KEEP IT ON THE CENTER LINE. A REJECTED TAKEOFF WAS PERFORMED. PERFORMED INSPECTION IAW AMM 72-00-00200-008-A, FOUND A FLEXIBLE SHAFT OF LOWER VBV BROKEN. SHAFT REPLACED IAW AMM 75-31-30-000-001-A. PERFORMED BOROSCOPE INSPECTION OF HPT IAW AMM 75-52-00-290-001 BAND LPT IAW AMM 74-54-00-290-005-A FOUND SATIFACTORY PERFORMED ENGINE RUN UP.