As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT CAUTION EICAS MSG AFTER ATTEMPTING TO START APU. AFTER LANDING FOLLOWED QRH AND APU FAILED TO START ON 2ND ATTEMPT. PERFORMED APU BITE PROCEDURES PER FIM 49-11 FT 958, NO FAULTS NOTED. ACCOMPLISHED OPS CHECK GOOD AT THIS TIME.