PTM Ch. 14 Landing Gear and Brakes Flashcards
How many wheels do we have?
6
Which gear doors remain open upon extension?
Nose gear
A GEAR DOOR POSITION annunciator will illuminate when?
When any of the main gear doors are unlocked when ON THE GROUND ONLY
What centers the nose gear at liftoff?
Snubber
How are the landing gear powered?
Electrically controlled and hydraulically actuated.
How many hydraulic actuators are attached to each gear?
2
Which actuators are pressurized during retraction?
Both
Which actuators are pressurized during extension?
The outside actuators on each main and the left on the nose gear.
Gear are locked down how?
Over center condition of drag brace along with one extension actuator
How are gear locked up?
Mechanical up lock
Gear control and indication is powered by what?
Left essential bus transferrable to the right
A gear warning horn will actuate if all 3 gear are not down and locked AND:
Flaps are lowered slightly beyond 1/2 or,
Either power lever is retarded to flight idle
When on the ground, what holds the landing gear lever in the down position?
A solenoid-actuated locking device
When airborne, what releases the solenoid-actuated locking device?
A squat switch on the left main gear
Should the gear lever ever be raised when on the ground?
No
How is it possible to override the solenoid-actuated locking device that locks the landing gear lever down on the ground?
OVERRIDE lever can release the locking device
When the gear is down what remains energized to hold constant pressure on gear as long as electrical power and hydraulic pressure are available?
Selector valve
What mechanically locks the gear down?
Gear drag braces move over-center
Once the gear is up and locked, what happens with the selector valve?
Returns to neutral position forming a fluid lock.
Is there any provision for gear retraction in a hydraulic or DC power loss?
No
Emergency gear extension is necessary for what?
DC power loss or hydraulic pressure loss.
Instructions for emergency landing gear extension can be found in what three places?
- Emergency procedures checklist
- Emergency procedures section of AFM
- On the emergency gear extension placard in the cockpit
NWS has a normal range of:
L or R 10 degrees
Max range with PARK button is:
L or R 63 degrees
Is takeoff allowed with hydraulic system failure?
No
Can NWS be MEL’d?
Yes
A Green NWS annunciator is illuminated when?
When NWS is armed
Once NWS is armed how do you use NWS?
Press the button in the left of the power lever OR, placing the right speed lever to LOW for 10 degrees
How do you use full NWS authority?
NWS armed with PARK button pressed
How long does it take for full PARK authority to be active?
About 7 seconds
The green NOSE STEERING or NWS annunciator can also flash. What does this mean?
Nose wheel has turned more than 3 degrees beyond the angle selected by rudder pedals
What should you do if the green NOSE STEERING or NWS annunciator is flashing?
Place NWS SWITCH to off.
The amber NOSE STEER FAIL annunciator illuminates when?
If hydraulic pressure is available to the nose wheel steering actuator with the system ON or OFF and engaged.
If NOSE STEER FAIL illuminates in flight what should you do?
Land with NWS ON
If NOSE STEER FAIL illuminates on taxi out what should you do?
Keep the nose steering ON, and write it up.
Is the brake system a part of the main hydraulic system?
No
Do we have anti-skid brakes?
No
What prevents both pilots from actuating brakes?
A shuttle valve
How do you use the parking brake?
Apply brakes and pull parking brake knob
NWS has a normal operating range of what according to the PTM?
12 degrees left or right of center (PTM 14-8)
A flashing NWS FAIL light indicates what?
A fault exists and the system disengaged.
Nose wheel steering operation after gear retraction is prevented by what?
Control circuits being opened by gear retraction.
