As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 321 - DEN - ON CLIMB-OUT AT 15000 FT, THE NR 2 ENGINE FAILED WITH A LOUD BANG. N1 AND N2 DECREASED RAPIDLY WITH THE EGT CLIMBING THROUGH 946 C. THE ENGINE WAS SHUTDOWN IMMEDIATELY. AN EMERGENCY WAS DECLARED AND RETURN TO DEN WAS MADE WITHOUT INCIDENT. THIS WAS A CONTAINED ENGINE FAILURE.