Falcon 900b landing gear

Question 1

How many hydraulic braking systems can actuate the brakes?

Answer 1

Three.

Normal, Emergency, Parking/Emergency

Question 2

How are the landing gear powered?

Answer 2

Electrically controlled and hydraulically actuated.

Question 3

How does the steering hand wheel control the nose wheel?

Answer 3

It sends electronic signals to the steering actuator.

Question 4

How is the main landing gear downlinked?

Answer 4

Two ways. By an integral lock in the actuator and by constantly applied hydraulic pressure.

Question 5

How is the main landing gear unlocked?

Answer 5

Mechanical unlock units that are hydraulically unlocked in the normal mode and mechanically unlocked in the emergency mode.

Question 6

How is the nose gear downlinked?

Answer 6

Mechanically by the telescopic locking tube which is also the drag brace.

Question 7

How is the gear handle locked in place when it is in the down position and the airplane is on the ground?

Answer 7

There is a locking pin that holds the gear down. The locking pin can be overridden at any time by the red pushbutton above the control handle. In later aircraft this button is removed.

Question 8

What does the flashing red light in the gear handle mean?

Answer 8

Either the gear is in transit or it fails to lock in either the extended or retracted position.

Question 9

If the red T handle next to the gear handle is pulled what happens?

Answer 9

Electrical gear extension control is bypassed and the hydraulic unlocks are released and the gear are hydraulically extended and locked in place. Good for extension only.

Question 10

What do the emergency gear D rings do?

Answer 10

The are mechanically connected to the unlocks and will release both the door and gear unlocks to allow the gear to freewill.

Question 11

What is the indication on the panel that a gear door is not closed?

Answer 11

A red, rectangular light on the gear panel will light up.

Question 12

How are the landing gear panel lights powered?

Answer 12

Primarily by the B1 bus with the A1 bus as a backup.

Question 13

What will trigger the “gear” audible warning?

Answer 13

Airspeed below 160kts, and any of the power levers below 73˚ PLA.

Question 14

What does it mean if the flaps are at 40˚ and the audible “gear” warning comes on?

Answer 14

Then one or more of the gear are not locked down. The voice cannot be silenced.

Question 15

Why is it necessary to test the antiskid system after the landing gear are down?

Answer 15

Because the antiskid is deactivated when the gear are unlocked

Question 16

What minimum airspeed should be maintained for the gear to freefall and lock in place?

Answer 16

160 Knots

Question 17

What are 3 things that indicate the need for tire replacement?

Answer 17

1. Tread depth less that .5mm
2. Flat spots that reach the metal reinforcing ply or obliterate the tread groove.
3. Nylon rings visible through the cracks at the bottom of the thread groove.

Question 18

What is nose gear tire pressure?

What is main gear tire pressure?

Answer 18

148 psi with weight on the wheels

197 psi with weight on the wheels

Question 19

How many pistons are on each brake?

Answer 19

10

Two sets of 5.