B757 Landing Gear

Question 1

What does the Gear Handle “Off” position do?

Answer 1

Depressurizes the gear hydraulics

Question 2

What happens when alternate brakes are used?

Answer 2

Autobrakes are inop

Question 3

When do Autobrakes activate?

Answer 3

1. Main truck untilt
2. Wheel spin up
3. Thrust levers idle

Question 4

What does BRAKE SOURCE light indicate?

Answer 4

Loss of Normal and Alternate braking

Question 5

When are Alternate Brakes automatically selected?

Answer 5

Loss of R Hydraulic Sys Pressure

Question 6

When are Autobrakes deactivated?

Answer 6

1. Fault in system
2. Speed brakes moved toward DOWN position
3. Thrust lever advanced
4. Off or disarm selected
5. Pedal braking

Question 7

What does DOORS light indicate?

Answer 7

Any gear door is not closed

Question 8

What does GEAR indicate?

Answer 8

Disagreement between handle and gear

Question 9

When will the autobrakes disarm?

Answer 9

1. Fault
2. Manual braking
3. advancing either thrust level after landing
4. Selecting DISARM or OFF on the autobrake selector
5. Moving the SPEEDBRAKE LEVER out of the UP detent after speedbrakes have been extended on the ground

Question 10

Gear doors max air speeds?

Answer 10

270 Kts

.82 Mach

Question 11

Reserve Brakes Switch

“on”

Answer 11

1. Allows use of reserve hydraulic fluid.
2. Activates right hydraulic electic pump
3. Isolates right hydraulic pump power to the normal brake system

Question 12

ALTN FLAPS

Answer 12

ALTN

1. Arms selected LE slat or TE Flap alternate drive unit
2. Shuts off hydraulic power to both the flap and slat drive systems

Question 13

How many brake systems are there?

Answer 13

4

Normal - right hydraulic
Reserve - right hydraulic

Alternate - left hydraulic
Accumulator

Question 14

Reserve Brake switch activates which pump?

Answer 14

Right system electric pump

Pump pressure is then supplied exclusively to the normal brake system

Question 15

Where are the runway turnoff lights located?

Answer 15

Nose gear

Question 16

When can RTO be selected?

Answer 16

Only on the ground.

After liftoff automatically moves to the OFF position

Question 17

BRAKE SOURCE

Answer 17

L and R HYDRaulic SYS press low
Select RESERVE BRAKES - ON
IF BRAKE SOURCE light STILL ON
Deselect RESERVE BRAKES
Only ACCUMULATOR left

Question 18

AUTOBRAKES

Answer 18

Fault in the system

Turn them off

Question 19

ANTISKID

Answer 19

Normal and alternate A/S INOP
due to
• partial power loss
• system malfunction 
• parking brake valve in the A/S return line fails to open when brake released