As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT CAUTION MESSAGE OCCURRED IN FLIGHT DURING STARTUP. COMPLIED WITH QRH. STRONG SMELL OF FUEL FUMES PRESENT IN COCKPIT AND CABIN AFTER, APU SHUTDOWN. REMOVED AND REPLACED ECU AND FUEL SOLENOID VALVE, IAW AMM CHAP 49. NO FUEL LEAKS OR SMELL IN AIRCRAFT. (M)