As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)DURING DESCENT, LARGE TORQUE FLUCTUATIONS ON #1 ENGINE ACCOMPANIED BY FLAMES FROM THE EXHAUST AND SMOKE IN THE CABIN. ENGINE SECURED AND LANDED OK. LARGE AMOUNT OF OIL IN THE EXHAUST AREA AND SIGNIFIC ANT DAMAGE IN THE COMPRESSOR AREA.