727 Systems (KFL)
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What powers System A Hydraulics?
Engine driven pumps, engine 1 & 2
What powers System B Hydraulics?
2 electric pumps
What powers the Standby Hydraulic System?
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
- Lower Rudder
- Brake interconnect
What does System B Hydraulics power, (assuming Ground Interconnect is closed)?
[Answer has 6 parts]
- Aft Airstairs
- Inbd Spoilers
- Upper Rudder
- Main Gear Brakes
What is the purpose of the Ground Interconnect?
To open a valve to allow Sys B to power Sys A units.
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.
What is the purpose of the Standby Hydraulic System?
To power Lower Rudder and LEDs when Sys A is unable to.
What action(s) will provide power to the Standby (AC electric) pump?
- Standby Rudder Switch to ON
- Alternate Flaps Master Switch ON
Positioning Standby Rudder Switch to ON positions the System ____ power switch to ____ and isolates hydraulic pressure from the ____, ____, ____, ____.
- Lower Rudder Power Unit
Positioning the Alternate Flaps Master Switch to ON arms the ____, ____, ____,
Alternate Flap Switches
Moving either Alt Flaps to DOWN opens ____, ____, ____ and ____, ____, ____.
- Leading Edge Flaps
- Slats Shutoff Valve
____, ____, ____ 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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