As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTO SHUTDOWN THREE TIMES. APU INOP GENERATOR FILTER FAULT. REPLACED LUBE AND GENERATOR SCAVENGE OIL FILTER PER MM. ALSO SERVICED OIL, ADDED 1 QT. RAN APU AND LEAK CHECKED FILTER, NO LEAKS NOTED. RAN APU FOR 45 MIN. APU DID NOT AUTO SHUTDOWN.