As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON DECENT, CHECK SLIDE PRESSURE CAUTION MESSAGE REAPPEARED ON FLIGHT ATTENDANT PANEL. FLIGHT ATTENDANT REPORTED SLIDE PRESSURE DECREASED FROM WHAT IT WAS FILLED TO PRIOR TO DEPARTURE. MAINTENANCE REPLACED DECODER ENCODER UNIT B (DEU) PER AMM 23-73-47. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.