Ice and Rain Systems
How is ice kept from forming on the pitot tube of an airplane?
Pitot tubes are heated by electric current flowing through heater elements built into them.
What are the four main parts of an aircraft tire
Bead, carcass plies, tread, and sidewall
Where can you find a list of brake fluids approved for the aircraft?
In the aircraft service manual.
Why is landing gear retracted?
to reduce aerodynamic drag and improve aircraft performance.
Where may the instructions for greasing a retractable landing gear on an aircraft be found?
In the aircraft maintenance manual.
How can you tell, on a preflight inspection, that the pitot heater is operating?
Turn it on for about a minute and then on the walk-around inspection, feel it to see that it is warm
What is a tube-type tire
A tire that requires an inner tube to hold pressure
What is used to flush brake lines and cylinders if the system uses vegetablebase fluid?
Alcohol.
What is an emergency extension system?
A backup system used when normal gear extension fails.
Where may a list of the approved lubricants for greasing an aircraft retractable landing gear be found?
In the aircraft maintenance manual.
Why is it important that ice not be allowed to build up on airplane wings in flight?
Ice distorts the shape of the airfoil and destroys the aerodynamic lift. The weight of the ice loads the aircraft down.
What is a bias-ply tire?
A tire with reinforcing plies arranged diagonally across the tire
What is used to flush brake lines and cylinders if the system uses mineral-base fluid?
Naphtha, varsol, or Stoddard solvent
What is indicated by a red light in the landing gear position-indication portion of the annunciator panel?
The red light indicates that the landing gear is not in a safe condition for landing.
What is the purpose of the centering cam in a nose-wheel shock strut?
The centering cam forces the nose wheel straight back with the strut before it is retracted into the nose-wheel well.
How is ice prevented from forming on the windshield of modern jet transport airplanes?
The windshield has a heater element embedded in it. Electric current heats the windshield and keeps ice from forming on it.
What is a radial tire?
A tire whose plies run radially from bead to bead for improved service life and performance.
How do you measure the amount of brake lining wear on single disk brakes?
Measure the clearance between the disk and the inboard side of the brake housing with the brakes applied.
What information is given to a pilot to indicate that all of the landing gears are down and locked?
Three green lights are used on most aircraft to indicate that all three landing gears are down and locked.
How does a shimmy damper keep a nose wheel from shimmying?
It acts as a small hydraulic shock absorber
How can a pilot determine if an electrothermal propeller deicer is working?
The pilot should observe an increased ammeter reading when the system is energized
Why is it important that some aircraft with retractable landing gear be given a retraction test after new or retreaded tires are installed?
It is possible in some aircraft that a new or retreaded tire can be different enough in size from the previous tire that it could lock up in the wheel well when the landing gear is retracted.
What is the purpose of the debooster in a hydraulic power brake system?
The debooster decreases the pressure and increases the volume of fluid going to the brakes. This gives the pilot better control of the brakes.
What is the most likely cause of a landing gear warning system failing to warn when the landing gear is not down and locked?
A faulty or misadjusted microswitch.
What causes an aircraft tire to wear more in the center of the tread than on the shoulders?
Operating the tire in an overinflated condition.