As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T1157/15OCT - RIGHT ENGINE PRESSURE RATIO FLUCTUATION AND VIBRATION ON TAKEOFF ROLL ENGINE COMPRESSORS STALLED. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED NUMBER TWO ENGINE ON 16 OCT 2007 AT DFW DUE TO FAN FOD DAMAGE DURING TAKEOFF. FAN BLADE BENT FORWARD AND SOME REPORTS STATE BIRD FOD. SYSTEM GROUND CHECKED NORMAL OPERATION.