As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CHECK DOOR PRESSURE / CHECK SLIDE PRESSURE MESSAGE ON FLIGHT ATTENDANT PANEL ILLUMINATED. MAINTENANCE FOUND CFDS FAULT MESSAGE FOR DEU-B, REPLACED DEU-B AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 23-73-47.