Systems LANDING GEAR

Question 1

Landing Gear actuation is powered by

Answer 1

Hydraulic System No 1
FCOM 1 14-02-1

Question 2

The Aircraft brakes and Park Brake are _____ powered

Answer 2

Electrically
FCOM 1 14-04-1

Question 3

What are the max turn angles available by the steering tiller and rudder pedals below 45 kts

Answer 3

Tiller < 30 kts 80 deg
> 30 kts < 100 kts 80 deg to 6.4 deg at 67 kts to 4 deg at 100 kts
Rudder pedals < 45 kts 8 deg
> 45 kts to 100kts linear to 4 deg
FCOM 1 14-03-2

Question 4

What occurs when the guarded ALTN GEAR is selected DN

Answer 4

DC ESS 3 powers Electric Motor Actuators EMA to release uplock hooks to allow freefall gear extension
ALTN GEAR DN on EICAS
FCOM 1 14-02-9

Question 5

When does the autobrake function activate for a RTO and at what level of braking

Answer 5

> 60 kts Throttles IDLE
Maximum Braking
FCOM 1 14-04-16

Question 6

At approximately what temperature will the 3 fusible plugs on the brake side of each wheel melt

Answer 6

200 deg
FCOM 1 14-04-5

Question 7

How many Electric Motor Actuators EMA are in each Brake assembly

Answer 7

4
FCOM 1 14-04-7

Question 8

Brake wear is computed by the ….. in relation to EMA travel

Answer 8

Electric Motor Control Unit EMCU
FCOM 1 14-04-7

Question 9

When commanded the Brake system uses 28 VDC from the … to energise the EMAs

Answer 9

DC ESS 1 & 2 busses
FCOM 1 14-04-8

Question 10

Brake temperature and wear are monitored and transmitted to the STATUS synoptic page by the …

Answer 10

Brake Data Concentrator Units BDCU
FCOM 1 14-04-8

Question 11

The Electric Motor Actuator Contollers EMACs provide what braking protection

Answer 11

Anti Skid
LDG gear retraction braking
Touchdown protection
Locked wheel protection
Derotation
FCOM 1 14-04-11

Question 12

Anti skid is deactivated when wheel speeds are less than

Answer 12

10 kts
FCOM 1 14-04-12

Question 13

The Brake Data Concentrator Unit sends a signal to all brakes after LDG gear control lever is selected to UP for

Answer 13

5 secs
FCOM 1 14-04-12

Question 14

Locked wheel protection is inhibited when wheel speeds are less than

Answer 14

30 kts
FCOM 1 14-04-12

Question 15

Derotation protection limits braking force until

Answer 15

NLG WoW
Nose Pitch <1.5 degs
5 secs after main LDG gear wheels spin up
FCOM 1 14-04-12

Question 16

Are braking protections available with ALTN BRAKE ON

Answer 16

No
FCOM 1 14-04-13

Question 17

Manual braking is necessary to stop the aircraft regardless of AUTOBRAKE switch position at a ground speed of less than

Answer 17

60 kts
FCOM 1 14-04-16

Question 18

Automatic braking is deactivated when

Answer 18

Manual braking is applied >20%
AUTOBRAKE switch selected off
Thrust levers are advanced above IDLE
FCOM 1 14-04-17