As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TWICE IN FLT AUTO FAIL & ALTN LIGHTS CAME ON MOMENTARILY THEN OFF, NOTED THE CABIN DESCENDED AT 500 FT IAW MIN THE CLIMBED 500' PER MINUTE. ACFT GROUNDED. PERFORMED FIM TASK 21-31 TASK 801 DCPC EXISTING & FAULT HISTORY W/NO FAULTS FOUND. ACFT OK FOR SERVICE.