As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON APPROACH INTO AIRPORT AFTER START ATTEMPT OF APU, WE OBSERVED AN APU RED CAS MESSAGE OF APU LOW OIL PRESSURE FOLLOWED BY RED CAS MESSAGE OF APU OVER TEMP. THIS FOLLOWED BY AN AUTO SHUTDOWN. REMOVED APU, INSTALLED REPAIRED APU. SERVICED WITH 2.5 QTS OF 2197 OIL. WORK PERFORMED IAW AMM 24-22-02, AMM 49-12-01, AMM 12-13-49, AND AMM 49-10-00. PERFORMED OPS CHECK AND LEAK CHECK WITH NO DEFECTS NOTED.