As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER OVERHAULING THE PRESSURE REGULATOR USED ON THE EVACUATION SLIDE INFLATION SYSTEM, DURING THE CHARGING PROCESS THE GAUGE ON THE PUMP WAS SHOWING PRESSURE BUT THE SUSPECT GAUGE WAS NOT RECORDING ANY PRESSURE (THE NEEDLE STAYED AT ZERO). THE GAUGE WAS REMOVED FOR SERVICE.