Q-LANDING GEAR

Question 0

What does the landing Gear handle light indicate ?

Answer 0

Landing gear in transit

Question 1

How is the landing gear controlled and actuated ?

Answer 1

Electrically Controlled
Hydraulically Actuated
Mechanically Locked

Question 2

What happens when you open the alternate landing gear release door above FO’s seat ?

Answer 2

Opens check-valve and depressurizes the system

Question 3

What is the the steering range with the steering tiller ?

Answer 3

70 degrees

Question 4

How does the MLG and the NLG retract ?

Answer 4

The MLG retracts aft into the nacelle.

the NLG retracts forward into the nose section.

Question 5

Explain the gear door enunciator lights. What do they indicate in terms of their position and advisory.

Answer 5

L DOOR-N DOOR-R DOOR.

Amber indicators gear door is open
Out indicates door is closed after gear cycle.

Question 6

Explain gear safe advisory lights.

Answer 6

Green-gear down and locked

Blank-gear locked upright.

Question 7

Explain selector lever lock switch

Answer 7

Must be pressed before you operate the gear.

Question 8

Explain landing gear alternate realeas door.

Answer 8

Closed the landing gear operates normally via the landing gear lever.
Open- gear cannot be extended using normal hydraulic power and door must stay open for alternate gear extension.

Question 9

Main release handle.

Answer 9

Must be pulled to release main gear hydraulic doors and main gear up locks releasing the main gear.

Question 10

Landing gear alternate extension door.

Answer 10

Door closed, normal operation of the landing gear with the lever.
Door open, alternate gear hydraulic extension.

Door must remain open.

Question 11

How can you verify the gear is down and locked when the alternate gear extension is used ?

Answer 11

Select the alternate gear verification switch and then observe the alternate gear verification lights turn green.

If the toggle switch is not armed aft the system won’t verify the gear down and locked.

Question 12

What controls the whole landing gear system form the gear to the hydraulic doors and the advisory system ?

Answer 12

The proximity sensor electronic unit ( PSEU )

Question 13

What prevents the gear from retracting while on the ground ?

Answer 13

WOW sensors.

If the theres a failure in the sensors the following caution light comes on.
WT ON WHEELS caution.

Question 14

Explain gear retraction sequence.

Answer 14

Selecting gear level up.

The #2 HYD system retraction side activates the nose gear door and retract the nose gear.
It also opens the main gear aft doors and retracts the main gear.

Question 15

What is the advisory sequence when the gear is retracted ?

Answer 15

Red lights L N R unsafe lights.
Amber lever handle
L N R safe lights out indicating gear is unlocked.
Amber gear door lights on indicating door is open.

Question 16

What is the advisory sequence when gear lever is selected down ?

Answer 16

Unsafe lights -red
Safe lights- out
Gear lever - amber
Door lights - Amber

After successful gear extension only the safe - green lights should be on.

Question 17

What procedure must be followed when the LDG INOP caution lights on ?

Answer 17

Alternate gear extension procedure.

Question 18

Explain alternate gear extension.

Answer 18

Selecting the INHIBIT switch to inhibit isolates all hydraulic pressure from the landing gear system.
Opening the LANDING GEAR RELEASE door, opens a bypass valve in the normal gear extension and gives access to MAIN LANDING GEAR RELEASE HANDLE.

Pulling the handle releases the main landing gear door and up locks. The gear will free fall but may not extend all the way.
You then have to open the LANDING GEAR ALTERNATE DOOR, and use the hand pump.

The nose gear is released down by using NOSE GEAR RELASE HANDLE.

Question 19

Where does the nose wheel steering get its power from ?

Answer 19

2 HYD System.

Question 20

What are the nosewheel limits.

70 degrees-slow taxi
8 degrees - take off with the rudder pedals

Answer 20

120 deg if the nose steering switch is turned off !

Question 21

Describe the breaks.

Answer 21

Each main wheel is equipped with multi disc break unit powered by the #1 HYD system.
An anti skid control into ( ASCU ) modulates the application of break pressure to the breaks.

Question 22

When does anti skid work ?

Answer 22

When it’s turned on and speed is greater then 10 knots.

Question 23

Anti skid caution lights

Answer 23

.

Question 24

Nose wheel min and max

Answer 24

1”min

3”max

Question 25

Main gear

Answer 25

2”min

6”max

Question 26

PSEU

Answer 26

.

Question 27

What does the Inhibit switch do ?

Answer 27

inhibiting gear operation with the landing gear lever.

the LDG GEAR INOP light will come on