ORAL * E145 Landing Gear and Brakes

Question 1

How Many WOW sensors?

Answer 1

5…2 each main, 1 nose

Question 2

Nose WOW switch used by what?

Answer 2

Thrust reverser logic and steering control

Question 3

How do mains doors operate?

Answer 3

Mechanically linked with an arm to landing gear leg

Question 4

How does nose door operate?

Answer 4

Hydraulically actuated and operate in sequence with the nose gear

Question 5

Landing Gear Lever is

Answer 5

Electric, and is linked to the LGEU Landing Gear Electronic Unit

Question 6

During retraction how does LGEU control retraction?

Answer 6

Handle in UP commands Nose Gear Door Solenoid Valve and Landing Gear Electrovalve…This allows pressure from HYD system 1 to reach the down unlock actuators and the landing gear actuators

Question 7

After landing gear up and locked what happens?

Answer 7

Gear sensed up and locked and nose gear door closes then landing gear electrovalve is depressurized

Question 8

Why can’t you move lever on ground

Answer 8

Ground prox switch locks it

Question 9

Can you over ride lever?

Answer 9

Yes, with an unlock button

Question 10

What does override do?

Answer 10

Bypasses LGEU and directly actuate gear valves

Question 11

How does Free Fall release gear?

Answer 11

Mechanically unlocks the unlocks and depressurizes the lines

Question 12

When does Landing Gear voice message occur?

Answer 12

< 1200 ft and idle, any flap condition, can cancel
<1200 ft and idle, flaps 22, cannot cancel
Flaps 45 any alt, cannot cancel

Question 13

How to cancel Gear warning audio

Answer 13

Guarded Button on center pedestal

Question 14

In the GEAR WARNING Button amber bar…when will it go away?

Answer 14

Put the gear down, or flaps 22 or greater or advance the thrust,

Question 15

If RA failed does landing gear warning work?

Answer 15

Yes, it triggers at any altitude

Question 16

LG/Lever disagree when?

Answer 16

Gear isn’t in position after 20 seconds

Question 17

Gear is in transit…what is on EICAS?

Answer 17

Amber/black hatches

Question 18

Where do landing gear down and locked indications appear?

Answer 18

EICAS, and RMU engine backup page

Question 19

Landning gear lever disagree shows how?

Answer 19

Red/Black cross hatched boxes on EICAS

Question 20

BCV Valves..ow many

Answer 20

4 one on each wheel

Question 21

What are normal braking protections?

Answer 21

Anti Skid, Wheel locked, and touchdown protection

Question 22

Anti skid auto above what speed?

Answer 22

10 knots

Question 23

Locked Wheel Protiection at what speed?

Answer 23

30 knots

Question 24

Touchdown protection prevents brakes until

Answer 24

3 seconds WOW, or 50 knots on wheels

Question 25

What stops wheel spin on retractions

Answer 25

Brakes on mains, and a stopper in the nose

Question 26

Emergency Brake Protections?

Answer 26

Overrides all

Question 27

Can you adjust brake pressure with emergency handle?

Answer 27

Yes

Question 28

If you pull emergency brake how is it actuated?

Answer 28

Mechanically

Question 29

What HYD system on Emergency Brake?

Answer 29

2, from system 2 accumulator

Question 30

Emergency Brake indication on?

Answer 30

BRAKE ON

Question 31

EMRG BRK LO PRESS...can emergency brake be used?

Answer 31

Yes, Once if there's no leakage

Question 32

How many uses of emergency brake with accumulator only

Answer 32

6...or 24 hours of emergency brake sitting still

Question 33

How to set emergency brake?

Answer 33

Press brake pedals in set or release

Question 34

BRAKE OVERHEAT?

Answer 34

450C

Question 35

on MFD, indications are green when?

Answer 35

At or below 250C

Question 36

Nosewheel steering...which HYD system?

Answer 36

HYD 1

Question 37

Nose wheel steering with pedals?

Answer 37

5 degrees

Question 38

Steering with pedals and steering handle?

Answer 38

76 degrees

Question 39

Steering with Steering handle only?

Answer 39

71 degrees

Question 40

Steering system shuts off if rudder inputs displaces wheel how much?

Answer 40

7 degrees...reset with steering handle

Question 41

How do you manually disengage steering

Answer 41

Button on control wheel...allows castering

Question 42

What caution message if you push Steering Disengagement Button?

Answer 42

STEER INOP

Question 43

How do you reset steering

Answer 43

Push down on steering handle

Question 44

Priority..Steering Handle or Disengagemtn button?

Answer 44

Handle

Question 45

VLO Up....Down? Down and Locked?

Answer 45

200 up, 250 down, and down and locked

Question 46

Brake wear...how do you tell?

Answer 46

Brake wear indicators on the brake assembly. (Pins) When they're flush, replace