As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START ISOL VALVE SELECTED APU FAULTS AND SHUTS DOWN(<P>PERFORMED ECU BITE CHK PER FIM 49-11 FAULT TREE 958 CHECKED APU WITH AND WITHOUT ENGINES RUNNING PER AMM 49-11-00 AND AMM 72-00-00 NO FAULTS NOTED APU OPS CKS NORMAL </P>)