AIR SYSTEM_1

AIR SYSTEM

1. Bleed AIR

   • GND Bleed Air
   • ENG Bleed AIR
     • ENG bleed valves close automatically During ENG START GND air cart supplying air BLEED source loss BLEED air over temperature BLEED duck leak ENG fire handle pulled
   • APU
     • APU BLLED AIR MAX ALT 22000
     • APU Bleed air Supply ENG start GND air conditioning Pressurization for no ENG bleed T/O APU to Pack selection for T/O accomplished through FMC
   • Duct leak and overheat Detection

2. Pressurization

   • Outflow and control valve
     • Two Outflow Valve
       • forward and aft and most of air out from aft
   • Two Positive pressure relief valved
   • Four negative pressure relief door
   • Pressurization system indicateions
     • Cabin ALT 8500
     • Cabin ALT PRESSURE 1000
     • Cabin ALT 13500psu masks drop automatically

3. Air Conditioning System

   • two identical controllers on each Pack
     • Protection are automatic for pack control FAULT Detection Overheat protection
       • if singnificant fault is detected pack shuts down automatically Attempt to retore pack oepation may be made my pressing Air Conditioning reset switch
   • Standby Cooling mode
   • Air distribution
   • Cargo Temperature Control
   • Equipment Cooling

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