As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BITE MX MESSAGE DISPLAYED ON ECS PAGE. ECU BITE SHOW DEOIL SOLENOID CIRCUIT FAILED. WIRES RANG OPEN FROM ECU. REPLACED DE-OIL SOLENOID VALVE, NO HELP. FOUND WIRE OPEN BETWEEN D4024P PIN 5 AND DE-OIL SOL CONNECTOR P11 PIN 1. FOUND WIRE FROM PIN 5 D4024P TO DIODE SEPARATED IN BUNDLE. SPLICED DIODE INLINE, APU ECU FAULT HISTORY ERASED IAW FIM.