What was found
AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT REPORTS DOOR 3L NOT SHOWING ARMED LIGHT AND MESSAGE CHECK DOOR PRESSURE IS IN THE CIDS. MAINTENANCE FOUND 3L DOOR DAMPER AN EMERGENCY OPERATION CYLINDER PRESSURE READING / ZERO NO PRESSURE. MAINTENANCE FOUND THE DOOR DAMPER AN EMERGENCY OPERATION CYLINDER WAS LEAKING AND REPLACED THE THE CYLINDER DIAPHRAGM (AALA202406205645) AND THE SERVICING VALVE O-RING / PACKING (AALA202406206343). A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO LEAKS OR FAULTS NOTED.