As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AUTO SHUTDOWN ON THE INITIATION OF TAKEOFF ROLL. ABORTED TAKEOFF AND TAXIED AIRCRAFT BACK TO THE GATE. FOUND APU DOOR POTENTIOMETER BAD. INSTALLED NEW POTENTIOMETER IAW 49-14-01. RIGGED DOOR AND RAN APU. ALL CHECKS OK AT THIS TIME.