As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED THAT THE APU LOAD CONTROL VALVE BEING INTERMITTENT IN OPERATION. THE MAINTENANCE VENDOR DETERMINED THE APU CONTROL VALVE WAS DEFECTIVE. THE VALVE WAS REMOVED AND REPLACED WITH AN OVERHAULED VALVE. OPERATIONAL AND LEAK CHECKS WERE SATISFACTORY. AIRCRAFT WAS RETURNED TO SERVICE.