Hydraulic System DREAMLINER Transport Elements System Pressure Tubing ■ Titanium,T-3-2.5 Requires thicker wall tubing Qualification to 5080 psi for industry commonality Threat zones will use 21-6-9 CRES tubing ( thrown tread area, pressure dome, etc.) Return Pressure tubing Thin wall titanium. Ti-3-25 Aluminum inside the fuel tanks Boeing ProprietBoeing Proprietary Hydraulic System Transport Elements ◼ System Pressure Tubing ◼Titanium, Ti-3-2.5 • Requires thicker wall tubing • Qualification to 5080 psi for industry commonality ◼Threat zones will use 21-6-9 CRES tubing (thrown tread area, pressure dome, etc.) ◼ Return Pressure Tubing ◼Thin wall titanium, Ti-3-2.5 ◼Aluminum inside the fuel tanks