As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, PRIOR TO PUSH BACK WHEN HYDRAULIC PUMPS AND FUEL PUMPS SELECTED ON, RECEIVED AN APU FAULT AND APU AUTOMATICALLY SHUT DOWN. FOUND HIGH OIL TEMP FAULT APU ECU, REMOVED AND REPLACED OIL TEMP SENSOR PER AMM 49-94-01. REPLACED APU OIL COOLER BYPASS VALVE PER AMM 49-27-10-404-006.