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 FLIGHT THE 4L DOOR DISPLAYED AMBER ON THE FLIGHT ATTENDANT PANEL WITH ASSOCIATED "CHECK DOOR PRESSURE AMBER VERBIAGE ILLUMINATED.SERVICED 4L DOOR DAMPER CYLINDER PER AMM 52-10-00. FLIGHT ATTENDANT PANEL MESSAGE CLEARED.