As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 2 AUTO CABIN PRESS CONTROLLER FAILED & THEN AFT GALLEY DOOR LIGHT ILLUMINATED ON ANNUNCIATOR PANEL. EMER DECLARED FLIGHT RETURNED & LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. REPLACED NR 2 AUTO CABIN PRESS CONTROLLER. SYS GND CHECKED NORMAL OPERATION CLOSED.