As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTO SHUTDOWN WITH 'APU OIL QTY' EICAS MSG DISPLAYED. DIVERTED TO ASU . *S/D* APU STARTER WAS FOUND LEAKING WHICH CAUSED THE LOP SHUTDOWN. REPLACED APU STARTER PER ENGINEER'S UPDATE. ALSO, REPLACED GEARBOX SHUTOFF VALVE AS A PRECAUTIONARY ACTION. SERVICED APU WITH OIL AND TESTED OK WITH NO FURTHER LEAKS AND OPERATION BACK TO NORMAL.