As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 7735 - GEG TO LAX - FLIGHT CREW REPORTED DURING TAXI APU HIGH TEMP AND APU FIRE INDICATION ON EICAS. SPOKANE AIRWAY CONTRACT MECHANICS REMOVED ICE FROM APU INLET AND VERIFIED NORMAL OPERATION. A/C WAS RELEASE IN AIRWORTHY CONDITIONS TO RETURN FOR SERVICE.