Flashcards in HYDRAULICS/GEAR/BRAKES/FLIGHT CONTROLS Deck (42):
What is the purpose of the AUX hydraulic system?
Provides hydraulic pressure to the lower rudder PCU when hydraulic pressure is lost to the right hydraulic system.
** a DCMP powered by the LEFT ESSENTIAL BUS cycles between 2500-3350 psi to maintain accumulator pressure.
What holds the gear up in place?
How much hydraulic pressure do the DCMP's put out?
**The DCMP's put out only 200 psi less than the EDP's however they move less volume than the EDP's.
Although the Left and right hydraulic systems are independent of each other is it possible for hydraulic fluid to migrate from one system to the other?
YES. in order to avoid this, set and release the parking brake by pressing on the toe brakes. If you release the parking brake without pressing the toe brakes, fluid will migrate to the left system.
What happens at the Bottom of the AOA red band?
What happens at the top of the red AOA band?
Stick pusher activates.
What is the pressure output of the Engine Driven Pumps (EDP's)?
When ROLL DISC is actuated who controls what?
LP controls spoilers
RP controls ailerons
In terms of percentage, how much roll authority do you have with the spoilers and with the ailerons?
spoilers 60% ailerons 40%
** If you were to pull the "ROLL DISC PULL TO ACTUATE" lever on the LP's Yoke (Split the roll system), The Captain will control spoilers and the First Officer will control ailerons.
When do the DCMP's begin to operate automatically?
anytime the flaps are out of 0 and the switches are in auto, or low pressure is sensed.
Normally, how long does it take to extend the flaps from 0-30?
How long can it take to extend the flaps when using alternate flaps or with only the right DCMP?
up to 70 seconds.
Why is there a gate at the flaps 10 position?
to prevent inadvertent retraction of the flaps to 0 during a go around.
What powers the left DCMP?
Right Main Bus.
What powers the RIGHT DCMP?
Left Essential Bus.
When you set the park/emer brake, how many wheel brakes are activated?
When using the EMERGENCY brakes, pressure is applied to ______ wheels?
all 4 wheels.
*** no anti skid protection is available
Right System Quantity (appx)
How many motors power the Primary and Secondary stab trim?
2 motors, 2 channels.
FCOM2 (10-02-2, 10-02-5)
Left system Quantity (appx)
Is Mach trim available in SECODARY stab trim?
NO. Only in primary.
What is the purpose of the PTU?
To aid in gear retraction if loss of pressure is sensed in the left system (LEFT EDP not operational)
How many spoiler panels are there?
What panels are the Roll spoilers/Flight Spoilers/Multi-Function Spoilers, and up to how many degrees will they deploy?
Which panels are ground spoilers and to what max degree angle do they deploy to?
When you pull the spoiler handle to MAX, which panels deploy?
1,8 (button on the top of the spoiler handle must be pressed to bring the handle out of 0)
**There are 9 DETENTED positions between 0 and MAX.
When you pull the spoiler handle to EMER, which panels deploy?
1,2,7,8 ( The button on the spoiler handle must be pressed again to bring the handle from MAX to EMER)
When the Ground spoilers deploy, do the flight spoilers also deploy?
Yes. All 8 panels deploy.
With the GND SPOILERS switch in AUTO, the ground spoilers deploy when the thrust levers are at idle and 2 of the 3 following conditions are met:
- Radio Altitude less than 7 feet
- Weight on Wheels
- Wheel speed greater than 16kts
The gust lock, locks what?
How are the other control surfaces gust locked?
Hydraulically via the PCU's
What is the order to turn on the hydraulic pumps?
LEFT - ON
RIGHT - ON
AUX - AUTO
PTU - AUTO
LEFT - AUTO
RIGHT - AUTO
Does the WX radar have overflight protection?
YES. Above FL200 there is a 6000' storm over flight protection.
During total loss of hydraulics (manual reversion), what happens to the PCU's?
They lock out so the cables connected to the PCUs allow movement of the flight controls. Ailerons EXCLUDED (they are cable driven all the time)
Left Hydraulic System Items:
Inboard Multi Function Flight Spoilers
Inboard Ground Spoilers
Inboard Elevator PCU's
Upper Rudder PCU
Right Hydraulic System Items:
Outboard Multi Function flight spiloers
Outboard Ground Spoilers
Outboard Elevator PCU's
Lower Rudder PCU
Main Gear assist
Stab trim range
How is the Nose-wheel steering centered while in flight?
Steering Control Unit (SCU)
What is the purpose of the bent tab on the ailerons?
It prevents up-float to a minimum at high speeds.
On which aileron is the trim tab located?
During the takeoff roll with the ground spoilers in auto, to what speed do you have to accelerate to in order for spoilers to deploy during an RTO