Landing Gear

Question 1

What is the meaning of an illuminated “GEAR” light?

Answer 1

There is a disagreement between the gear position and the gear handle.

Question 2

Describe how the Alternate Gear Extension System operates.

Answer 2

The Alternate Gear Extension is operated through the left hydraulic system via DC powered electric pump. Fluid in the supply system is sufficient to lower the gear but will not re-close the doors. Pressing the ALTN GEAR EXTEN switch unlocks the uplocks allowing the doors and gear to free fall to the down and locked position.

Question 3

Which lights may remain illuminated after performing the Alternate Gear Extension procedure?

Answer 3

“DOORS” and EICAS advisory message “GEAR DOORS.”

Question 4

What is the meaning of an illuminated “DOORS” light?

Answer 4

A landing gear door is not closed.

Question 5

Which hydraulic system powers the Normal Brakes?

Answer 5

Right

Question 6

If installed, what is the meaning of an illuminated “BRAKE TEMP” light?

Answer 6

A wheel brake temperature is in high range (value of 5 or above on STATUS page).

Question 7

How is the Alternate Brake System activated?

Answer 7

The Alternate Brake System activates automatically when right hydraulic system pressure is low. The left hydraulic system automatically supplies pressure to the alternate brake system through the alternate anti-skid valves.

Question 8

Which hydraulic system powers the Alternate Brake System?

Answer 8

Left

Question 9

What is the meaning of an illuminated “BRAKE SOURCE” light?

Answer 9

Both the Normal and Alternate brake system pressures are low.

Question 10

What happens when the “RESERVE BRAKES” switch is pushed?

Answer 10

Provides reserve hydraulic fluid to the right system electric pump. Pump pressure is then supplied exclusively to the normal brakes system.

Question 11

What is the purpose of the Brake Accumulator.

Answer 11

The accumulator stores pressure in the case that both right and left systems fail (Normal/Reserve & Alternate). Depending on conditions it may only supply one application of the brakes. Anti-skid operations may drain the system quicker.

Question 12

What does the amber band on the Brake Pressure Gauge represent?

Answer 12

Initial accumulator precharge.

Question 13

How do you conserve accumulator pressure when operating with only accumulator brakes?

Answer 13

Use continuous brake pressure instead of multiple applications.

Question 14

Which brake systems have Anti-Skid capability?

Answer 14

The Normal/Reserve and alternate systems offer anti-skid. Note that the anti-skid is a downgraded system offering only laterally paired wheels anti-skid protection.

Question 15

What is the meaning on an illuminated “ANTISKID” light?

Answer 15

There is a fault in the Anti-Skid system.

Question 16

Which brake systems have autobrake capability?

Answer 16

Normal/Reserve

Question 17

When are the autobrakes activated during an RTO?

Answer 17

When on the ground and GS is above 85 knots and both thrust levers are reduced to idle.

Question 18

What kind of braking capability is provided with the Autobrakes selected to RTO?

Answer 18

Maximum

Question 19

What provides the maximum braking, Max Manual or Max Auto?

Answer 19

Max Manual

Question 20

When are the autobrakes applied during landing?

Answer 20

Both thrust levers are retarded to idle and the wheels have spun up.

Question 21

By what means can autobrakes be deactivated.

Answer 21

Pedal braking, either thrust lever advanced, speedbrake lever is moved from the full up position after deployment, selection of DISARM or OFF, autobrake fault or normal antiskid system fault.

Question 22

What is the meaning of an illuminated “AUTOBRAKES” light?

Answer 22

The autobrakes are disarmed or inoperative.