As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB OUT APU FUEL VALVE SHOWED OPEN AND APU FLAP SHOWEDOPEN. EXCESSIVE FUEL FLOW FROM LEFT MAIN TANKS AND POSSIBLE APUFUEL LEAK SO DIVERTED BACK TO DFW. MAINTENANCE REPLACED IDG ACTUATOR IAW AMM 49-23-51.