As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING DEPARTURE FLASHING RED CABIN PRESSURE LIGHT ON DOOR 3R. NORMAL CLIMB OUT CABIN PRESSURE INDICATIONS AND CRUISE AT FL330.DELTA PSI 7.9CABIN ALTITUDE 6200FT. FLIGHT CREW REPORTED THAT THE SLIDE DOES NOT INDICATE ARMED ON DOORS PAGE. MAINTENANCE REPLACED THE CABIN PRESSURE WARNING-LIGHT PANEL OF THE DOOR 3R PER AMM 52-73-22. (AALA202508117741) AND ADJUSTED THE R3 DOOR PROXIMITY DETECTOR SENSOR PER AMM 52-71-00. (AALA202508111377) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.