What was found
THE CUSTOMER REPORTED THAT THE CREW OXYGEN SYSTEM LOST PRESSURE OVER A FEW DAYS. DURING TROUBLESHOOTING OF THE SYSTEM THE TECHNICIAN FOUND THE ADAPTER FITTING, P/N 500189, LOCATED BETWEEN THE TUBING NUT AND THE PRESSURE GAUGE, P/N 171013-00, FOR THE CREW OXYGEN BOTTLE, LOCATED IN EXTERNAL OXYGEN SERVICING PANEL. FURTHER INSPECTION REVEALED THAT THE FITTING WAS CRACKED LONGITUDINALLY ON THE FEMALE PORTION OF THE FITTING, WHICH IS A PIPE THREAD. THIS CRACK IS EXACTLY THE SAME AS PREVIOUSLY REPORTED AND PRINTED IN AC 43-16A. A NEW GUAGE, P/N 171013-00 WHICH INCLUDES THE FITTING, P/N 500189, WAS INSTALLED AND LEAK CHECKED. NO LEAKS WERE NOTED.