Landing Gear Flashcards
“Brake Overheat” CAS appears at what temp?
650 C
Fusible plugs melt at what temp?
199 C to release tire pressure if the wheel overheats
Safety Plug deflates tire when?
Will deflate the tire if internal tire pressure exceeds 425 psi
What does Anti-Skid sys provide?
- Skid protection
- Locked wheel protection
- Touchdown/hydroplane protection
- Main wheel de-spin control (takeoff)
How many pins are removed before flight from the landing gear and door system?
6 - 3 gear, 3 door
Vlo emergency
175 kts
Vlo, Vle
225 kts, 250 kts
During preflight, a gear uplock is closed. What action should you perform?
- Pin gear door valve open
- Tun on ext batt switch at L Front Access panel
- Actuate aux pump at R Front Access panel until the gear door and uplocks open
- Remove gear door pin
- Actuate aux pump again until gear door closes
- Turn off external batt switch
If landing gear fails to retract, what action must be performed to prevent landing with 400 lb of applied brake pressure (wheel de-spin brakes)?
Press and hold the DUMP valve for 3 sec - releases the hyd pressure held on the brakes
Which “Down and Locked Indication” has precedence?
The Landing Gear Control Panel.
Independent circuits for each ground lock switch
Emergency Landing Gear Nitrogen Bottle Pressure
3,100 PSI
What does an illuminated GEAR HANDLE light mean during gear retraction?
The landing gear and/or gear doors are NOT retracted (up and locked)
When will the GEAR HANDLE light extinguish during gear extension?
When the Landing GEAR is down and locked (gear door position not consider)
When will the Landing Gear Warning Horn sound if gear is not extended?
Flaps > 22° (can’t mute)
Aircraft Altitude < 350’ AGL and either throttle positioned to IDLE (may be muted)
Anti Skid braking is available from which hyd sys?
Left / PTU / AUX
What is the Min Accumulator Pressure to set the parking brake?
1700 psi min, recommended 3000 PSI
Max Brake Pressure when using the PARK/EMER BRAKE or during No Antiskid Braking is?
400 PSI
What change occurs to the Brake Pressure display on the Brake synoptic when antiskid is selected Off?
Pressure scale changes to a Max 800 PSI and an Amber Line appears at 400 PSI
The Digital Antiskid Control Unit (DACU) also supplies wheel speed input of knots to which items?
Ground Spoilers
Thrust Reversers
Below 18 kts Ground Speed, tiller steering provides how many degrees of steering?
80° left and right
Rudder Pedal Steering normally provides how many degrees of steering?
7° left and right
If TILLER STEERING FAIL CAS, rudder pedal auth increases to 16°
If you get an Amber WOW FAULT msg during flight, you shoud:
Select Ground Spoiler Switch OFF
Checklist
An Amber WOW FAULT msg displayed during flight is an indication of?
Both MAIN GEAR WOW switches being in GROUND mode
If you experience a Blue WOW FAULT msg during flight, you should
Refer to checklist
What is required of the combined WOW to be in AIR mode?
One main gear wow in AIR
If the Gear Handle will not move to the UP position after takeoff, you should:
Select Ground Spoiler Switch OFF
Refer to QRH checklist for landing gear failure to retract
When would the landing gear warning horn sound on the ground?
Aircraft on the ground (WOW switches compressed)
ADS indicates < 60kt, and gear handle is in the retract position
