As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A COMMERCIAL FLIGHT WHILE STARTING THE TAKEOFF ROLL, ENG POPPING & FLUTTERING WAS HEARD WHEN THROTTLE ADVANCED ON TAKEOFF ROLL. THE PILOT REDUCED THROTTLE TO IDLE & SLOWLY BROUGHT IT BACK UP. SAME SCENARIO OCCURRED WITH POPPING & FLUTTERING. THE ACFT WAS TAXIED BACK. ENG REMOVAL IS BEING SCHEDULED.