Landing Gear Flashcards
Gear Disagree mean?
Gear position disagrees with lever
Max speed with gear down and extension and retraction?
270kias / 0.82
What does moving landing gear lever to off position do?
Removes hydraulic pressure from landing gear system
When does gear down lights illuminate?
When gear down and locked and gear doors have closed
How gear and doors help up?
By mechanical uplocks
Where are the tilt sensors?
On main landing gear
What does nose air/ground sensing send signals to? (2)
- Stall warning system
- Portions of warning and caution system
Can you take off if AIR/GND SYS or NOSE A/G SYS indicated on EICAS?
No
What system removes the landing gear lever lock airborne?
Tilt sensor
How is gear put in tilt position when lowered?
Hydraulically
How many degrees for NWS via rudder pedals?
7 deg
Tiller turns NWS up to how many deg?
65 deg
How NWS, flaps, slats, and LDG gear powered if left hyd sys fails?
Right system through PTU
How ALT Gear work?
Main battery bus DC powers dedication electric hydraulic pump to release uplocks and gear free falls (uses fluid within supply line)
Normal hyd sys for brakes?
Right
When does alternate brakes auto come on?
When right hyd sys press is low
What system does alt brakes use?
Left
When does brake source light illuminate?
When both normal and alt brakes sys pressures are low
When in alt brakes what happens when brake pedals pushed?
sends hyd pressure through the alternate anti-skid valves to the brakes
What brake systems does the autobrakes only work on?
Only the right systems of normal and reserve brakes (as anti-skid uses normal anti-skid valves, not alternate)
Can the parking brake use any of the brake systems?
Yes
What is min brake accumulator pre-charge pressure?
1000PSI
What system pressurises the brake accumulator?
Right hyd sys
How many brake applications can the accumulator provide?
several
What does AUTO BRAKES light mean?
Auto brakes either disarmed or inoperative
When does RTO engage?
- RTO selected
- Above 85kts
- Both thrust levers are retarded to idle
How disengage RTO braking once initiated? (4)
- aircraft stops
- speedbrake lever stowed
- manual braking
- move selector top off
Whats higher on a dry runway on landing? Man braking or Max Auto?
Manual braking
When do autobrakes engage on landing? (2)
- both levers are at idle
- wheels have spun up
How does autobrakes apply braking after touch down?
A small amount after touchdown, then scheduled amount once less than 1deg of pitch angle
How disengage autobrakes on landing? (4)
- man braking
- turn switch to off or disarm
- speed brake lever moved down
- throttles moved forward
Which brake systems have anti-skid?
All 3
Which wheels receive anti-skid pairing in alt system?
lateral pairs
Does normal/reserve system provide anti-skid for individual wheels?
Yes
What does BRAKE SOURCE light mean?
Both normal and alt systems pressures are low
DOORS light means?
A door is not closed
