As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE LOG PAGE 843531, DURING CRUISE FORTY FIVE MINUTES INTO THE FLIGHT, THE FLIGHT CREW NOTICED AN INTENSE BURNING SMELL IN THE CABIN. THE FLIGHT CREW DECLARED AN EMER & THE ACFT DIVERTED. COMPLIED WITH FUMES IN THE CABIN OIL SMOKE AT THE AUXILIARY POWER UNIT IAW TSM 49-00-81-810-874-A. OPERATIONAL CHECK WAS GOOD. ACFT OK FOR SERVICE.