As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION FOUND THE L-2 DOOR EMERGENCY OPERATION CYLINDER PRESSURE GAUGE READING ZERO. MAINTENANCE REMOVED AND REPLACED THE DIAPHRAGM IN PERCUSSION MECHANISM OF L-2 DOOR EMERGENCY OPERATION CYLINDER, SERVICED TO PROPER PRESSURE, LEAK AND OPERATIONAL CHECK WAS GOOD.