As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT, "AUTO FAIL" LIGHT ILLUMINATED ALONG WITH "ALTN". COMPLIED WITH QRH CHECKLIST. CABIN DESCENDED NORMALLY. ACFT GROUNDED. REF FIM 21-31, TASK 801. PERFORMED CPC BITE ON BOTH NR 1 & NR 2 CONTROLLERS. NO FAULTS WERE LOGGED, BITE TEST PASSED AND GROUND VERIFICATION WAS SUCCESSFUL.