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 THE APU SHUTS DOWN WHEN BLEED AIR LOAD WAS APPLIED. THE MAINTENANCE TEAM VERIFIED DISCREPANCY AND FOUND THE APU INLET TEMP SENSOR DEFECTIVE. THE SENSOR WAS REMOVED AND REPLACED WITH A NEW UNIT. OPS CHECKS WERE SATISFACTORY, AND THE AIRCRAFT WAS RETURNED TO SERVICE