As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT AT FL 350, PRESSURIZATION "AUTO FAIL" AND "ALTN" LIGHTS ILLUMINATED. ACCOMPLISHED CHECKLIST. OPS OK WITH ALTN MODE. GROUNDED - YES. ACCOMPLISHED FIM 21-31 TASK 827. AUTO FAIL RECOVERED. REPAIR CONFIRMATION TEST GOOD REF FIM 21-31 TASK 801 DCPC BITE. NO PREVIOUS HISTORY.