List Questions, What’s on Main Stby Bus, Hydraulics System 1 etc…

Question 1

What are some individual equipment items powered by main AC bus?

Answer 1

1)TRUs
2)Navigation Radios
3)Flight Control Computers
4)Flight Deck Lighting
5)Pitot & Window Heat

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Question 2

What individual equipment items are powered by the ground service bus?

Answer 2

Main & APU Battery Chargers
Fuel Pumps for APU start
Flight Deck Flood, Navigation and Service Lights
Misc. Service Outlets and Equipment

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Question 3

What Individual Equipment Does the Ground Handling Bus Power

Answer 3

Lower cargo doors, handling equipent, and lights
Fueling System
Aux Hydraulix Pump 4

Question 4

What is powered by the two transfer busses?

Answer 4

-Captain
a) Center EFIS/EICAS Interface Unit (EIU)
b) Left HF
c) APU Stby Bus

-First Officer
a) Autothrottle Servo
b) Lower EICAS Display
c) Right ADC, EFIS Control, EIU, FMC, CDU, HF, ND, PFD

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Question 5

Utility Busses Power What?

Answer 5

Forward Main Fuel Pumps 2&3
Forward Override/Jettison Pumps 2&3
Center Override/Jettison Pumps
Galley Equipment
APU T/R
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Question 6

What does the main deck cargo handling bus power?

Answer 6

Main Deck:
Lights
Cargo Handling Equipment
Nose and Side Cargo Doors

Question 7

What are some individual items the Main DC Busses power?

Answer 7

-Cabin Pressure, Pack Temp and Fuel Jettison Controllers
-Fuel Transfer & Jettison Valve Control
-Wing Anti-Ice and Individual Nacelle Anti-Ice Control
-Engine Driven and Hydraulic Demand Pump Control

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Question 8

Individual Equipment on Main Batt Bus

Answer 8

-Alternate APU Controller
-Fuel Valves (All engines)
-Cross Feed Valves (All)
-Lights: Dome, Storm & Selected Interior
-IDG Disconnect
-Manual PSI Controller
-Trailing Edge Flap Control
-CA Interphone, Left Radio Tuning Panel, Left VHF

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Question 9

Individual Equipment on APU Batt Bus

Answer 9

-APU DC Fuel Pump
-Engine Start Air Control
-Carg, FO’s & Service Interphones
-PA System
-APU & Engine Fire / Overheat Detection Loops A & B
-APU Fire Warning Horn

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Question 10

Main Hot Battery Bus Idividual Items

Answer 10

APU Fuel Shutoff Valve
Spar Valves (All engines)
Fire Extinguishers:
-APU
-Lower Cargo
-Engines (All)
-Fire Switch Unlock (All engines)

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Question 11

APU Hot Battery Bus Individual Items

Answer 11

-IRU L, C, R DC power
-Left and Right Outflow Valves
-APU Inlet Door
-APU Controller (Primary)

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Question 12

1) What does the standby AC system provide
2) What are the major components of the system

Answer 12

1)Main Stby Bus
1)L EIU, CDU, ILS, VOR, ADC, Transponder, EFIS Control
2)Standby Ignition for all engines
3)Primary EICAS, RMI, Standby Instrument Lights
4)Various Flight Control Components
APU Stby Bus
1)L PFD
2)L ND
3)L FMC

2) Main and Stby:
-Busses
-Batteries
-Standby Inverters
Standby Power Selector

Question 13

What checklists have immediate action items?

Answer 13

1. CABIN ALTITUDE / Rapid Depressurization
2. ENG 1, 2, 3 ,4 AUTOSTART / Aborted Engine Start
3. Engine Limit or Surge, or Stall
4. IAS DISAGREE / Airspeed Unreliable
5. FIRE ENG 1,2,3,4 / Engine Severe Damage or Separation
6. Multiple Engine Flameout or Stall
7. Evacuation