As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 050 - DURING APPROACH TO DFW, LEFT ENGINE BEGAN VIBRATION WITH NO ABNORMAL COCKPIT INDICATIONS. REDUCED POWER TO LT ENGINE AND VIBRATION DIMINISHED. EMERGENCY DECLARED AND AIRCRAFT LANDED DFW WITHOUT INCIDENT. REPLACED NR 1 ENGINE DUE TO TURBINE BLADE FAILURE. SYSTEM LEAK AND GROUND CHECKED NORMAL OPERATION. (X)