As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM - BTB - APU AUTO SHUT DOWN. PERFORMED BITE OF APU ECU FOUND LOW OIL PRESSURE FAULT. INSP APU FOUND LUBE OIL FILTER DPI POPPED. T/S IAW FIM 49-11-00 FIG 109 REMOVED AND REPLACED LUBE AND SCAVENGE OIL FILTERS IAW MM 49-27-03, RESET DPI. RAN APU AT GATE FOR 60 MIN IAW MOC. REINSPECTED APU BITE ECU, NO FAULT, NO EICAS MSGS OK FOR SERVICE.