As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PER INBOUND FLT CREW APU FAULT LT ILLUMINATED ON APU RESTART. GROUNDED - YES. PERFORMED APU BITE TEST REF FIM 49-60 TASK 801. FOUND MX MESSAGE 49-31171. PERFORMED FIM 49-31 TASK 808 WAITED 30 MIN AND RESTARTED APU START WAS NORMAL. NO MESSAGE ON CURRENT STATUS PAGE. A/C OK FOR SERVICE.