As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT AND AUTO SHUTDOWN. 4 TIMES EACH TIME APU LASTED FOR LESS TIME. DPI'S ON THE OIL FILTERS ARE GOOD. FOUND BIG CHIPS AND BALL BEARING ON GEAR BOX CHIP DETECTOR. ALL OIL DRAINED OUT BECAUSE VALVE DID NOT CLOSE. CHIP DETECTOR REINSTALLED. REPLACED APU. OPERATION NORMAL.