As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 611 - DFW - ABORTED TAKEOFF AT THE BEGINNING OF TAKEOFF ROLL, DUE TO 'POP' HEARD AND DECELERATION OF NR 1 ENGINE. FOUND SHAFT SHEARED ON NR 1 ENGINE DRIVEN FUEL PUMP. REPLACED PUMP. ACCOMPLISHED VISUAL AND BOROSCOPE SECTIONS, NO DEFECTS NOTED. ENGINE TURNS FREELY, NO DEBRIS ON MAGNETIC PLUGS. (M)