As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O, NR 2 ENG AT V1 ROLLED BACK TO JUST ABOVE IDLE POWER. FLT ATTENDENT IN REAR HEARD LOUD NOISE. ENG WOULD NOT RECOVER THRUST. WE LEFT ENG AT IDLE. ON LANDING EGT STARTED TO INCREASE. SHUT DOWN ENG, NO OVER TEMPS. FOUND 13TH STAGE DUCT BLOWN INTERNALLY AND SEPARATED FROM CASE. REPLACING ENGINE.