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What powers System A Hydraulics?
Engine driven pumps, engine 1 & 2
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What powers System B Hydraulics?
2 electric pumps
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What powers the Standby Hydraulic System?
Electric pump
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What does System A Hydraulics power, (assuming Ground Interconnect is closed)?
[Answer has 10 parts]
- Ground Spoilers
- Outbd Spoilers
- Trailing Edge Flaps
- Gear Actuation
- Nose Gear Brakes and Steering
- LEDs
- Lower Rudder
- Brake interconnect
- Elevators
- Ailerons
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What does System B Hydraulics power, (assuming Ground Interconnect is closed)?
[Answer has 6 parts]
- Aft Airstairs
- Inbd Spoilers
- Upper Rudder
- Main Gear Brakes
- Elevators
- Ailerons
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What is the purpose of the Ground Interconnect?
To open a valve to allow Sys B to power Sys A units.
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What is required to have Ground Interconnect allow Sys B power Sys A units beyond being open?
Must have APU on the Bus or External power connected.
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What is the purpose of the Standby Hydraulic System?
To power Lower Rudder and LEDs when Sys A is unable to.
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What action(s) will provide power to the Standby (AC electric) pump?
- Positioning:
- Standby Rudder Switch to ON
- Alternate Flaps Master Switch ON
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Positioning Standby Rudder Switch to ON positions the System ____ power switch to ____ and isolates hydraulic pressure from the ____, ____, ____, ____.
- A
- Off
- Lower Rudder Power Unit
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Positioning the Alternate Flaps Master Switch to ON arms the ____, ____, ____,
Alternate Flap Switches
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Moving either Alt Flaps to DOWN opens ____, ____, ____ and ____, ____, ____.
- Leading Edge Flaps
- Slats Shutoff Valve
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____, ____, ____ drives the hydraulic motor pump assembly. The pump portion uses fluid from ____, ____ to extend ____, ____, ____.
- Standby System Pressure
- System B
- Leading Edge Devices
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