Landing Gear Flashcards
What is OFF position for for the landing gear?
Removes hydraulic pressure from the system.
The landing gear indicator lights indicate red when:
one or more of the gear is in disagreement with the lever or they are in transit. Lights also illuminate when the a/c is below 800’ AGL with the gear not down and locked and one or both thrust levers are retarded to IDLE.
The landing gear lights show green when:
gear is down and locked.
Where is there another set of gear indicator lights?
Aft overhead panel. They operate from separate circuits.
T/F: Only one light, either center panel or overhead panel needs to be lighted for a gear to be considered down and locked.
True
Landing gear ______ and ________, as well as _______, receive power from hyd sys A.
extension, retraction, nose wheel steering.
T/F: Autobrakes are available with both normal and alternate brakes.
False. Just normal.
When anti-skid is inop, what can’t you do for takeoff?
not able to use an assumed temperature reduced takeoff thrust takeoff.
How many air ground sensors are there?
6, 2 on each gear
On the _____, RTO mode is available.
ground
After touchdown, and once wheel speed is greater than 30 kts, an _________ landing mode may be selected.
autobrake
On the ground, the LANDING GEAR _____ solenoid is latched.
lever lock.
Flight locks(doors): when ___ or more entry /service doors are closed and either engine N2 RPM is greater than 50%, the flight locks become engaged.
3
Flight locks become disengaged on the ground when either thrust lever is less than _____.
53%.
Below 2000 feet RA the AT (provided armed) is available for a _______
go around
AT are disengaged ______after touchdown.
2 seconds
With an airborne cargo fire, the _______extinguisher bottle timer is enabled.
2nd
If sys B resivoir fluid is lost due to a leak downstream of the landing gear transfer unit, a sensor closes the LGTU and alternate steering is ________.
not available.
The plane must be ________ for nose wheel steering to be powered.
on the ground
Nose wheel tiller inputs can be rotated up to
+/- 78 degrees.
Rudder pedals can supply steering control of up to
+/- 7 degrees
When does nose wheel steering deactivate?
on takeoff as the nose wheel strut extends
For aircraft _______ or ________ without having to depressurize the hydraulic systems, a lockout pin installed in the towing lever will depressurize nose wheel steering.
towing; pushback
What hyd sys supplies pressure for the brake accumulator?
sys B
T/F: anti-skid is available with both normal and alt brakes.
True
What is the difference in anti-skid protection in normal vs alt?
Normal: anti skid for each individual wheel
Alternate: just wheel pairs.
Brake systems provide protection from what?
Skid, locked wheel, touchdown, hydroplanning.
T/F: Anti-skid is available with loss of both hyd systems
true
What hyd system provides pressure for autobrakes?
Sys B
When RO is selected, AUTO BRAKE DISARM light illuminates momentarily to indicate operation of the _______.
self test.
How do you arm RTO mode
on ground anti-skid and autobrakes work AUTO BRAKE switch in RTO wheel speed less than 60 kts thrust less than idle.
If takeoff is rejected below 90 kts, autobraking will not start. The ___________ light will not illuminate and RTO remains aremed
AUTO BRAKE DISARM
How is the RTO mode activated?
speed greater than 90 kts and thrust levers moved to IDLE.
On a dry runway, _____ deceleration is not as great as _______braking.
MAX; full pedal
If the crew does not terminate autobraking, the aircraft will_________.
come to a complete stop
How are autobrakes disarmed?
speed brake lever moved to the down detent
one or both thrust levers advanced
manual brakes applied.
T/F: the parking brake can be set with ________pressure
accumulator
If a spinning tire with loose tread impacts a fitting in the wheel well ring opening,
retraction is stopped and the gear free falls back down.
Main gear is held in the up position by ________.
mechanical uplocks
if the left engine fails on takeoff, what happens with respect to the landing gear?
the landing gear transfer unit will use hyd sys B to supply the fluid volume req’d to ensure retraction of the gear at a normal rate.
What 3 things bring the gear down?
Hydraulic pressure, gravity and air loads.
What holds the landing gear down and locked?
overcenter mechanical and hydraulic locks
If the Manual Extension Access door is open, what 3 things can happen?
- gear extension is possible with handle in any position
- normal gear extension is possible with hyd sys A
- landing gear retraction is disabled.
What 3 things could cause the landing gear lever to not go to the up position?
Failure of:
air/ground system
ground spoiler bypass valve to close
landing gear lever lock solenoid.
If the gear won’t come up, you should?
leave the gear down and retract the flaps on schedule. d
If the cabin altitude/configuration warning horn sounds immediately after takeoff, what does this indicate?
a failure of the air/ground system or
failure of the ground spoiler bypass to close
When is manual gear extension necessary?
any gear not down and locked with the gear lever down
or
gear lever becomes stuck at off
For manual gear extension, when the last handle has been pulled, wait ______,then place the gear lever DN, if possible.
15 seconds
Partial or full gear up configuration?
Flaps 40 and set VREF accordingly.
