As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: CAUTION LIGHT AND A MESSAGE TO CHECK THE 4L DOOR PRESSURE DISPLAYED ON FLIGHT ATTENDANTS PANEL. MAINTENANCE NOTED THAT THE 4L DOOR DAMPER AND EMERGENCY OPERATION CYLINDER PRESSURE WAS IN THE YELLOW BAND AND SERVICED IT PER AMM 52-10-00. CAUTION LIGHT AND MESSAGE EXTINGUISHED ON THE FLIGHT ATTENDANTS PANEL .