As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, MAINT ENTRY, APU AUTO SHUTDOWN AT THE GATE. BITE CHECK APU ECU FOUND OIL HIGH TEMP FLAG CAME ON. TROUBLESHOOT FURTHER AND FOUND APU OIL COOLING FAN DRIVE SYSTEM NOT TURNING AND GEAR TEETH DAMAGE. REMOVED AND REPLACED APU ASSY IAW HAL M266-767 UP TO STEP 50. COMPLETED HAL M266-767, 767 APU CHANGE.