As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT DURING PREFLIGHT CHECKS IT WAS NOTED THAT THE APU LOAD CONTROL VALVE (LCV) OPERATIONS WERE INTERMITTENT. TROUBLESHOOTING DETERMINED THAT THE APU BLEED-AIR LCV. THE VALVE WAS REMOVED AND REPLACED WITH A REPAIRED CONTROL VALVE. OPS CHECKS WERE SATISFACTORY.