As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO START APU AT ARRIVAL. *S/D* RAN APU, OPERATIONS CHECK NORMAL. AN OIL QUANTITY INDICATION SYSTEM FALSE MESSAGE IS SOMETIMES REPORTED AND IS SUSPECT IN THIS DISCREPANCY. THIS CAN RESULT FROM SERVICING THE APU OIL WHEN IT IS RUNNING. NO OTHER INCIDENCES HAVE OCCURRED.