Systems Ch. 12 Landing Gear and Brakes

Card Set Information

Systems Ch. 12 Landing Gear and Brakes
2012-07-14 19:12:15
Saab 340B Landing Gear Brakes

Landing Gear and Brakes
Show Answers:

  1. How many gear doors are there on each main gear
  2. How are the main gear doors attached to the gear
    2 doors mechanically linked and a 3rd door that is rigidly attached
  3. How is the gear door opened during preflight for inspection
    Pull the release ring
  4. Does the gear swing forward or aft druing retraction
  5. What is used for normal Gear extension and retraction
    Hydraulic pressure
  6. What centers the nose wheel for retraction
    Centering cams within the strut
  7. What is used to lock the gear in the down position
    Over center extension and Hydraulic pressure
  8. What locks the gear up
    Mechanical up locks
  9. What is used to pen the up lock during normal gear extension
    Hydraulic pressure
  10. How many weight on wheel switches per main gear
  11. How many weight on wheels on the nose gear
  12. How is the gear retracted if a weight on wheel switch fails
    By pressing the down lock release pushbutton
  13. What lights illuminate while pressing the gear test button
    Left, Nose, Right main gear lights and an Amber gear lever light
  14. Which gear must be locked down for the Amber light to extinguish
    All gear must be down and locked
  15. 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 
  16. What altitude does the EGPWS provide "too low gear" 
    500' AGL
  17. At what flap angle with gear not down and locked is a CONFIG WARNING alert given
    Greater than 15 degrees
  18. Which CWP light will illuminate if the gear is not locked down by 500' RA
  19. What prevents gear retraction on the ground
    A spring loaded latch pin
  20. What does pushing the Down Lock Release button do
    Mechanically releases the latch pin
  21. What is used for emergency extension
    Gravity, airflow, and assisted by springs
  22. Does the gear handle have to be in the down position for EMERGENCY extenstion
  23. What's lost if Emergency Extension is used and the gear handle is not down
    Anti-skid arming
  24. After Emergency extension will the gear doors be open or closed
  25. During Emergency Extension what separates the gear doors from the actuating linkages
    Explosive bolts
  26. How are the brake pads preflight checked
    Look at the wear pins
  27. What determines if the brake pad wear indicators are within limits
    If the indicators extend above the circular casing
  28. How are the brakes operated
  29. How many brake systems on the aircraft
    2, 1 inboard and 1 outboard
  30. At what speed does the anti-skid cut out
    20 knots
  31. What protects the tire from over pressure due to brake temperatures
    Pressure relief blow out plugs
  32. What is the purpose of the Anti-skid system
    To limit brake pressure and avoid locked wheels
  33. How does the Anti-skid determine if a wheel is "skidding"
    Compares inboard and outboard wheel speed
  34. 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
  35. What is touchdown brake protection
    Prevents brake application for 3 seconds after main gear compression or wheel speed exceeds 50kts
  36. 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)
  37. Can the brakes be set without getting a CWP light
    Yes (1500 psi sets the brake, 1700 psi is required for light to illuminate)
  38. At what psi does the PARK BRK ON light extinguish
    Less than 900 psi
  39. What psi is required for the PARK BRK ON to illuminate 
    1700 psi
  40. How is the parking brake set
    • Pulling the handle up
    • Rotating 30 degrees clockwise
    • Pushing the brake pedals 
  41. 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
  42. When must the nose gear pin be installed
    During pushback or towing
  43. How many degrees of steering does the NWS provide
    60 degrees either side of center
  44. What does pushing the tiller down do electronically
    Electrically opens the steering shutoff valve
  45. What does pushing the tiller down do mechanically
    Mechanically engages the tiller wheel
  46. What is the purpose of the C-Clip (gear pin)
    Deactivates the steering system for ground handling
  47. What is the max steering deflection for operations
    120 degrees
  48. Can the nose wheel rotate all the way around
  49. What is indicated by an illuminated Anti-Skid CWP light
    A system fault or gear is down with Anti-Skid off