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How many gear doors are there on each main gear
3
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How are the main gear doors attached to the gear
2 doors mechanically linked and a 3rd door that is rigidly attached
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How is the gear door opened during preflight for inspection
Pull the release ring
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Does the gear swing forward or aft druing retraction
Forward
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What is used for normal Gear extension and retraction
Hydraulic pressure
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What centers the nose wheel for retraction
Centering cams within the strut
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What is used to lock the gear in the down position
Over center extension and Hydraulic pressure
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What locks the gear up
Mechanical up locks
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What is used to pen the up lock during normal gear extension
Hydraulic pressure
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How many weight on wheel switches per main gear
2
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How many weight on wheels on the nose gear
0
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How is the gear retracted if a weight on wheel switch fails
By pressing the down lock release pushbutton
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What lights illuminate while pressing the gear test button
Left, Nose, Right main gear lights and an Amber gear lever light
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Which gear must be locked down for the Amber light to extinguish
All gear must be down and locked
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When is a CONFIG warning given for an unsafe Landing Gear condition
Any gear is not down and locked and RA below 500' or both power levers are below the 64 degree angle
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What altitude does the EGPWS provide "too low gear"
500' AGL
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At what flap angle with gear not down and locked is a CONFIG WARNING alert given
Greater than 15 degrees
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Which CWP light will illuminate if the gear is not locked down by 500' RA
CONFIG
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What prevents gear retraction on the ground
A spring loaded latch pin
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What does pushing the Down Lock Release button do
Mechanically releases the latch pin
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What is used for emergency extension
Gravity, airflow, and assisted by springs
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Does the gear handle have to be in the down position for EMERGENCY extenstion
No
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What's lost if Emergency Extension is used and the gear handle is not down
Anti-skid arming
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After Emergency extension will the gear doors be open or closed
Open
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During Emergency Extension what separates the gear doors from the actuating linkages
Explosive bolts
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How are the brake pads preflight checked
Look at the wear pins
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What determines if the brake pad wear indicators are within limits
If the indicators extend above the circular casing
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How are the brakes operated
Hydraulically
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How many brake systems on the aircraft
2, 1 inboard and 1 outboard
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At what speed does the anti-skid cut out
20 knots
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What protects the tire from over pressure due to brake temperatures
Pressure relief blow out plugs
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What is the purpose of the Anti-skid system
To limit brake pressure and avoid locked wheels
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How does the Anti-skid determine if a wheel is "skidding"
Compares inboard and outboard wheel speed
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What is required for Anti-skid operation
- Anti-skid switch ON
- Landing gear handle down
- PL below flight idle or
- WOW switch activated or
- Average Wheel Speed above 50 kts
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What is touchdown brake protection
Prevents brake application for 3 seconds after main gear compression or wheel speed exceeds 50kts
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Can the brakes be set without the PARK BRK ON CWP light illuminated
Yes (1500 psi sets the brake, 1700 psi is required for light to illuminate)
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Can the brakes be set without getting a CWP light
Yes (1500 psi sets the brake, 1700 psi is required for light to illuminate)
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At what psi does the PARK BRK ON light extinguish
Less than 900 psi
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What psi is required for the PARK BRK ON to illuminate
1700 psi
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How is the parking brake set
- Pulling the handle up
- Rotating 30 degrees clockwise
- Pushing the brake pedals
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What does the lockout switch do to the nose wheel steering system
When activated, inhibits tiller function to prevent NWS activation during ground handling ops
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When must the nose gear pin be installed
During pushback or towing
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How many degrees of steering does the NWS provide
60 degrees either side of center
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What does pushing the tiller down do electronically
Electrically opens the steering shutoff valve
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What does pushing the tiller down do mechanically
Mechanically engages the tiller wheel
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What is the purpose of the C-Clip (gear pin)
Deactivates the steering system for ground handling
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What is the max steering deflection for operations
120 degrees
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Can the nose wheel rotate all the way around
Yes
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What is indicated by an illuminated Anti-Skid CWP light
A system fault or gear is down with Anti-Skid off
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