As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT CIDS PANEL SHOWS CHECK SLIDE PRESSURE AT 3R DOOR INDICATION. MAINTENANCE ACCOMPLISHED A GROUND SCAN ON CIDS 1 AND NOTED A DEU-B 300RH6 FAULT. MAINTENANCE REPLACED DEU-B 300RH6 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 23-73-47 WITH NO FAULTS NOTED.