As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AIR INOP FOR ENG START. RESTORED SHUT OFF VLV TO NORMAL. MANUALLY OPENED APU SHUT OF VLV, APU SHOT OFF VLV OPS NORMAL. PACK OPS NORMAL, DRY MOTOR ENGINES NO PROBLEMS. APU SHUT OFF WAS CYCLED APPROX 15 TIMES, NO DEFECTS NOTED. ASCTU BITE HAS NO CURRENT FAULTS MCO/PLAC REMOVED.