As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKE-OFF ROLL AT 60 PERCENT TQ CTOT WAS NOT ARMED. THE CREW HEARD A LOUD BANG, AND THE RT ENGINE TQ STARTED TO DROP AND THE RT ENGINE ITT SPIKED AND THE ENGINE OVERTEMP WARNING LIGHT ILLUMINATED. PAX AT SEAT 10F SAW FLAMES FROM TAILPIPE. THE CREW IMMEDIATELY SHUT DOWN THE ENGINE AND RETURNED TO THE GATE. A/C TAKEN OUT OF SERVICE AT 1445(LT).