Landing Gear, Brakes, Steering Flashcards
What does a NWS LIMIT EXCEEDED(C) CAS indicate, and what action should be taken?
Call Maintenance.
Nosewheel has been turned beyond 120 degrees.
Check shear pins. If broken then the nose wheel has exceeded 123 degrees and possible damage has occurred.
How much steering authority is available with the tiller? Rudder pedals?
65 degrees tiller
7 degrees rudder pedals
What centers the nose gear during retraction?
(2)
- Electrically by the Steering Control Unit (SCU)
- Mechanically by cams on the top of the nose strut
Antiskid is available down to what speed?
10 knots
Why must we observe brake cooling times?
To ensure there is sufficient brake energy available to come to a complete stop within the charted distance if we reject a takeoff
The landing gear is normally actuated by which hydraulic system?
Left Hydraulic System
Gear is held up by what?
Mechanical uplocks
What do the brake accumulators provide us when loss of R and L hydraulic pressure?
(Total hydraulic loss)
1 continuous application to a complete stop.
Parking brake accumulator has sufficient pressure for how many applications?
6
If a gear control or left hyd system failure occurs, how do we get the gear extended?
Alternate method through the checklist - pull the manual release handle -“LG PULL”
What does the “LG PULL” handle do?
- Manually releases the uplocks(Nose and Main Gear)
* Actuates the dump valves(ports fluid pressure to the return side of actuator)
When should the “LG PULL” handle be stowed?
After landing and the gear pins installed.
What also assists the main gear to be fully extended(down and locked)?
Main landing gear down lock assist accumulator
Where do we read the main gear down lock assist accumulator pressure?
Gauge is located in the battery compartment (Purple band)
How do we check the brake wear indicators?
With the hydraulic system pressurized and parking brake set; the pins are not flush with the housing.
Where are the brake accumulator gauges located?
In the battery bay
With a NORMAL BRAKES FAIL indication, how will we apply braking to stop the aircraft?
• Will we have anti-skid or differential braking?
By pulling the Emer/Parking brake smoothly.
No.
When does the PTU operate in “AUTO” ?
(4)
- Left EDP failed
- Right EDP producing pressure.
- Weight off wheels(WOW in air)
- Gear not in the selected position (ie…gear is down with the handle “UP”)
What prevents the main tires from exploding in an overheat situation?
4 fuse sensitive plugs in each wheel assembly
How many brake wear indicator pins are there on each brake assembly?
2 pins on each assembly – 1 on top and 1 underneath
What components of the landing gear are monitored by the Proximity Sensing System?
Main landing gear, Nose gear, Nose gear doors.
Brakes are armed when?
- Gear down and
A) WOW for 5 seconds
—or—
B) 50 knot wheel spin up
Brake cooling times are found in the?
AFM
What is the maximum rotational travel each side of center of the nose gear while towing?
-120 degrees without disconnecting the torque links.
At what degree of nose angle might the nose landing gear swivel pins shear?
Beyond 123 degrees..
oWith torque links disconnected, what minimum nose gear strut extension is required in order to rotate the nose gear beyond the travel limits?
3.5”.
What centers the nose gear during retraction?
- Electrically by the Steering Control Unit (SCU)
- Mechanically by cams on the top of the nose strut
What do the brake accumulators provide us when loss of R and L hydraulic pressure?
1 continuous application of toe brakes to a complete stop.
If using the alternate gear extension procedure because of a HYD PRESS LOW (red) CAS, what is a concern if flaps have already extended?
- 30 minutes to extend the landing gear. The gear downlock assist accumulator will retain pressure for 30 minutes. Gear must be down prior to this time limitation if the flaps are other than 0O
What conditions cause GEAR warnings?
- Below 500’ AGL, gear is up or in transit, thrust lever angle < 26O – Aural warning “GEAR”. May also be accompanied by TAWS warning “TOO LOW, GEAR”
- Flaps beyond 27O before all 3 landing gear are down and locked. - Aural warning “GEAR”
What are the Gear warning indications?
- Aural warning, triple chime, red warning light, red on gear indications display
