As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLUE MAINT LIGHT ON APU-AFTER SHUTDOWN LIGHT LIGHT WENT OUT. ACFT GROUNDED. PERFORMED APU BITE CHECK 49-60-801. NO CURRENT STATUS FAULTS. FOUND MX MESSAGE 49-311171. PERFORMED FIM TASK 49-31-808. ALSO CONFIRMED 2 SUCCESSFUL APU GROUND STARTS. OK FOR CONTINUED SERVICE.