As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU "FAULT" ANNUNCIATOR ILLUMINATED ON APU START. GROUNDED YES. PERFORMED APU BITE CHECK FOUND FAULT MESS 49 15004 (INLET DOOR SHUTDOWN) PERFORMED FIM TASK 49 10 00 810 806 STEP A THRU STEP E OPERATED APU AT FULL LOAD THRU 5 CYCLES NO CURRENT FAULTS DISPLAYED AT THIS TIME. VERIFICATION FLIGHT OPS CHK NORMAL.