As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FLAMEOUT WHILE PARKED AT GATE PRIOR TO PUSHBACK. RAMP PERSONNEL NOTICED LARGE FLAME OUT EXHAUST. APU FAULT LIGHT ILLUMINATED. APU SWITCHED OFF. RAMP PERSON PULLED APU FIRE SWITCH IN WHEEL WELL. GROUNDED - YES. PERFORMED APU BITE, FOUND MX MESSAGE 49-11023 "REMOTE FIRE HANDLE PULLED" 11-6-19. PERFORMED FIM TASK 49-10 TASK 803 NO OTHER OCCURRENCES, RAN APU OPERATES NORMAL, PERFORMED APU BITE AFTER RUN, CURRENT STATUS NO FAILURES FOUND.