Landing Gear

Question 1

Under normal conditions, which hydraulic system operates the landing gear?

Answer 1

A

Question 2

Which hydraulic system(s) can pressurize the parking brake?

Answer 2

A or B during normal operations

SH 14.010 pg 26 - see page 16 for notes on brake accumulators

Question 3

If the #1 engine fails, is the hydraulic capability of system A greatly reduced? How is the gear raised at a normal rate to maintain climb performance?

Answer 3

Yes, raised via the landing gear transfer valve (LGTV)
B fluid transfers to A system to raise the gear (one way only)
​SH 14.010 pg 7

Question 4

How can the gear be lowered without hydraulic pressure? Can it be raised without hydraulic pressure? When is the landing gear lever locked? Can it be overridden?

Answer 4

Lowered by manual gear extension - releases uplocks and gravity falls
No, it needs HYD PRESS to be raised.
Landing gear lever is locked on the ground -
-

can be overridden by the lever lock override trigger
SH 14.010 pg 4

Question 5

When must RTO be selected? When is RTO braking available?

Answer 5

RTO must be selected prior to 60 kts wheel speed
RTO is available after 90 kts wheel speed (activates with thrust levers idle)
14.010 pg 23

Question 6

What could cause the ANTISKID INOP (amber) light to illuminate?

Answer 6

ANTISKID INOP = Fault in anti skid monitoring system or parking brake system
14.010 pg 21

Question 7

What do the red and green position lights on the forward landing gear panel indicate?

Answer 7

RED = gear unsafe or disagree (in transit)
GREEN = down and locked
14.010 pg 4

Question 8

What is the purpose of the aft overhead panel Supplemental Landing Gear indicator lights?

Answer 8

Redundancy
As long as one of the two systems shows a green light = gear is down and locked
14.010 pg 5

Question 9

What protects the aircraft from loose tread or foreign object debris in the main wheel well during landing gear retraction?

Answer 9

Frangible Fitting Valve (when impacted, relieves hyd pressure and drops the affected gear back down)
SH 14.010 pg 6

Question 10

How is nose wheel steering powered?

Answer 10

Powered by A or B, activated with weight on wheels

SH 14.010 pg 11

Question 11

If normal and alternate brake pressure is lost, how is braking accomplished? Are there any limitations?

Answer 11

By the brake accumulator - up to 6 applications, or 8 hours of parking brake engaged (you still have anti-skid)
SH 14.010 pg 16

Question 12

Describe how tires are protected from explosion during thermal expansion caused by hot brakes?

Answer 12

4 thermal fuse plugs on each main wheel inner half. Plugs melt and release tire pressure.
​SH 14.010 pg 3

Question 13

What does a Parking Brake Warning (red) light indicate?

Answer 13

Parking brake set with adequate hydraulic pressure.

SH 14.010 pg 26