Boeing 777 System (How does each system work together)

Anmerkungen:

• To make the big machine fly in the air  we need a lot of Thrust  1. The Engine burns the the Fuel (mix with Air) to get the Thrust. 2. In the Process we get the bleed  air from the exhausted air and Electric power and Hydraulic power(which produce from both engine and the pressure from bleed air as well) 3. We use the bleed air to pressurize the cabin,pumps,  warm thel  and also the source for anti-Ice, The electrical power to drive the pump and feed the aircraft for  need of AC and DC power. and Hydraulic power to make the movement of giant Flight control system possible Under the Command of Autopilot the throttle system.      

1. Engines and APU

   Anmerkungen:

   • The EEC (electronic engine control )the the full authority The EEC has normal and alternate mode Under Alternate mode we have Soft and Hard mode The EEC command Approach idle in flight if Engine anti-ice is operating, Flaps in landing position (25 or 30), One hydraulic air-driven demand pump is INOP, and the flaps are out of the UP position  The Opposite engine bleed air valve is closed Start is aborted for restart on GND for and no Restart for 
   • Engine Ignition Auto Relight Fuction Engine Fuel System Engine Oil System  Thrust Reverser Engine Failure Alert
   1. Hydraulic

      Anmerkungen:

      • Three Independent system  Left Center Right Left and Right System each has  Primary Engine driven PUMP Electrical Demand PUMP
      • Hydraulic L & R Demand pumps position at auto, and pumps run when ? Takeoff and landing (flaps extended) System or primary pump pressure drops On GND right pump operates continously 
      • Center hydraulic system has how many pumps  2 Electrical powered pumps Designated C1 and C2 pumps
      1. Flight Controls

         Anmerkungen:

         • Primary  Secondary  Direct
         • Mechanical back up
         • Flight Envelope Protection Stall Protection Overspeed Protection  Roll Evelope Bank  Protection
         • Thrust Asymmetry Compensation Wheel-Rudder Crosstie Yaw Damping Rudder and Aileron Trim Panel Stabilizer Trim
         • Flaps and Slats Primary  Secondary  Alternate
         1. Anti Ice & Rain
   2. Electrial

      Anmerkungen:

      • Electrical Load Management system Main AC power  (L&R) IDG Primary and secondary external power  APU generator External power ( Primary and Secondary)  Standby Power
      • 2 Back up Generator (BUG) SPD not regulated(constant SPD)  out put is regulated to 400 Hz by a converter Come on line and stay on one slightly below idle PRM There is Converter receives input from both backup generator at all time but can select and process inputs from only one BUG or the other, not both Simultaneously
      • Permanent Magnet Generators (PMG) two contained in each BUG Supply AC power to fight control Power Supply Assemblies(PSA) PSAs convert power from AC to DC for flight control computerese  Output is dedicated to flight controls cannot be diverted to elsewhere
      • DC Electrical system Main DC Electrical system PFDs NDs GPS ADIRU Flight Control DC Electrical system Transformaer Rectifier Units ( TRUs) L main DC R main DC C1 TRU to CA  flight instrument bus C2 TRU to FO flight instrument Bus
      • Standby Electrical System Supplies AC and DC to selected key items  Main Battery Standby Inverter  RAT C1 and C2
   3. AIR
   4. Bleed Air

      Anmerkungen:

      • Engine bleed air valves close automatically when Loss  of Bleed source Bleed air over temperatureBleed air overtemperature Bleed air overpressure Bleed air duct lick ENG fire handle is pulled  Ground air cart supplying air
      • APU bleed air Primary for Engine start  Ground air conditioning Pressurezation for no ENG bleed Take off APU TO PACK selection for take off accomplished through FMC
      • We have 2 Identical controler on Each Pachs Standby Cooling mode Duck Leak and Overheat Detection
   5. Fuel

      Anmerkungen:

      • One center tank L and R wing tank 2 AC pumps in each tank Any single pumps has enough output to supply fuel to operate one engine under all conditions Left Main Tank DC pump Nitrogen Generation Sysem
   6. Fire Protection
2. Instrument Navigation & Communication
3. Auto Pilot and FMC
4. Gear and Break
5. Warming Systems