As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. FLAMES REPORTED COMING FROM APU EXHAUST & SMOKE FROM APU INLET. NO FIRE WARNING OR INDICATION. SHUTDOWN APU. REPORTED TOTAL OIL QTY LOSS. FOUND TURBINE FAILURE DUE TO REAR BEARING FAILURE. R & R APU IAW MCM 49-96-82. ACCOMPLISHED OPERATIONAL & LEAK CHECKS. SYS CHECKED NORMAL.