As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS : "CIDS CAUTION" LIGHT ILLUMINATED ON FLIGHT ATTENDANT PANEL. MAINTENANCE FOUND MID LEFT DOOR ASSIST BOTTLE LOW AND SERVICED DOOR ASSIST BOTTLE AND PERFORMED SATISFACTORY OPERATIONAL CHECK PER AMM 52-10-00, ALL CIDS CAUTION EXTINGUISHED.