As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF AFTER V1 THE NUMBER 1 ENGINE HAD SEVERE FLUCTUATIONS IN ALL INSTRUMENTS WITH VIBRATIONS ON NUMBER ONE SIDE. HEARD THREE LOUD POPS NR 1 EGT WENT TO 700 DEGREES C, THREE DIFFERENT TIMES IN RAPID SUCCESSION. DUMPED FUEL RETURNED FOR LANDING. FOLLOWED COM PROCEDURES 2.72.15 AND 2.28.4.