Landing Gear Flashcards
What are the services on each HYD system
L & R systems: (FG)
Flt controls
Reverse
Center: (FFNG)
Flaps
Flt controls
Nose Gear
Gear
What is the max gear speed for RET and EXT
270 kts
displayed on Gear Handle
What and Where is the Rudder Pedal Steering Disconnect Switch
Temparary disconnect the rudder pedals from the nose wheel steering (good for flight control check)
on the Tiller
Where is the Alternate gear switch
landing Gear Panel
next to the gear handle
describe the Main gear Brake system
Electrically powered
Multiple-disc Carbon brakes
What other brakes systems are there
Anti skid
Auto brake
Parking Brake
What is Air/Ground Sensing
Sensors on Main Gear beams and struts
What stops the gear from being selected up on the ground
Lever lock
released when airborn
Can the Lever be overridden?
Yes
LOCK
OVRD
on gear panel
(only with non normal checklist)
How do gear doors operate
some Mechanically connected
some HYD operated
How does each gear sense down and locked
Main
Side Brace
Drag Brace
Nose Gear
Drag Brace
(If only one of the Braces on the main dont lock, EICAS message)
What System is activated by the ALTERNATE GEAR Switch
Dedicated DC power Electric HYD pump
Uses center HYD fluid
What does the Switch do
landing gear Free Fall to the down and locked position
HYD doors do not close thats why the EICAS GEAR DOOR message remains
If you use the Alternate Gear extension can you select the gear back up
YES
as long as the Center HYD is operating
How can you raise the gear after an ALT Gear Extension
select the Gear Lever UP
this resets the normal system
What can the tiller angles
Rudder pedal 8 deg
Tiller 70 deg
(Together they can be summed for extreme turns)
70+8
What powers the brakes
Back Up
Normal power
4 electric brake power supply units
What is a EBA
EBAC?
Electric Brake Actuators (4 per Wheel)
Controller
What speed on T/O does the Autobrake function NOT operate
< 85 kts
on T/O above 85 kts what is required to engage the Autobrake
Both thrust levers are retarded to idle
85 kts
on LDG what is required to engage the Autobrake
Both thrust levers are retarded to idle
Wheels have spun up
(continue until full stop unless disarmed)
What is the Normal range for the brake temp
0.0 - 4.9 (white)
What does a solid White box next to the brake temp mean
Hottest brake
What is the over heat brake temp range
5.0 - 9.9 (Yellow)
