Table 6-7.—Life Preserver Test Pressures FLOTATION CHAMBER LEAKAGE TEST MINIMUM PRESERVER TYPE TEST SEQUENCE PRESSURE (PSIG) PRESSURE (PSIG) LPA-2 series Both Chambers Simultaneously 2.0 1.6 LPU-21/P series Both Chambers Simultaneously 2.0 1.6 LPU-23/P series Both Chambers Simultaneously 2.0 1.6 LPU-24/P series Both Chambers Simultaneously 2.0 1.6 LPU-28/P Single Chamber Preserver 2.0 1.6 LPU-30/P Single Chamber Preserver 1.0 0.8 LPP, Pouch Type Single Chamber Preserver 2.0 1.6 hose mouthpiece. Maintain pressure between the valve on the oral inflation hose and alternately rubber hose and the oral inflation hose mouthpiece to ensure a good seal. Depress the position the leakage test fixture valve between the measuring device, vent, and air supply until the overpressure relief valve opens (2.5 psig ± .5 psig). Rotate the leakage test fixture valve to the measuring device position to ensure that the life preserver is inflated to the proper pressure. Release the valve on the oral inflation hose. Inspect for proper operation of the relief valve. 3. To test all preserver chambers, except LPU-28/P, unlock the oral inflation valve and insert it into the rubber hose. Rotate the valve to the air supply position and inflate the chamber. Alternately position the valve between the measuring device, vent, and the air supply until the proper pressure is attained. 4. Turn off the air supply, and after a minimum of 15 minutes, readjust the pressure, if necessary, to the original pressure. Refer to table 6-7. 5. Disconnect the air supply and check test fixture for leaks. Ensure all valves are closed. 6. Record temperature and barometric pressure. 7. Four hours after the adjustment period in step 4, record the test pressure. 8. Record temperature and barometric pressure and correct test pressure for any changes in temperature and barometric pressure. Figure 6-18 is an example of how you would record this information. Figure 6-18.—Example for recording readings. CAUTION DO NOT SUBMERGE LPU-23/P SERIES AND LPU-24/P SERIES LIFE PRESERVERS IN WATER TO CHECK FOR LEAKS. After 4 hours, if the pressure of the chamber is below 1.60 psig, inflate to leakage test pressure and coat with a soap solution to locate any leaks. Mark any leak area you find. Rinse the preserver with fresh water, air dry it, and repair it in accordance with NAVAIR 13-1-6.1. If the preserver has held the required pressure, deflate it. Ensure that the inflation valve lever is cocked. Install a carbon dioxide cylinder. 6-31