Landing Gear

Question 1

Describe the meaning of green Landing Gear Indicator lights for landing verification

Answer 1

Related gear is down and locked.
- Landing gear is down and locked as long as one green landing gear indicator light (center panel or overhead panel) for each gear is illuminated

Note: the overhead panel lights are backups in case the center panel lights burn out or malfunction somehow)

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Question 2

Explain the meaning of the (amber) AUTO BRAKE DISARM light

Answer 2

• SPEEDBRAKE lever moved to down detent during RTO or landing (really???)
• manual brakes applied during RTO or landing
• Thrust lever(s) advance during RTO or landing (except during first 3 seconds after touchdown or landing)
• Landing made with RTO selected
• RTO selected on ground (illuminates for two seconds then extinguishes)
• A malfunction exists in automatic braking system

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Question 3

Explain the meaning of the (amber) ANTISKID INOP

Answer 3

A system fault is detected by the antiskid monitoring system

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Question 4

Explain the function of the Landing Gear Override Trigger

Answer 4

Allows the landing gear lever to be raised, bypassing the landing gear lever lock

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Question 5

Recall antiskid is available in the normal and alternate braking systems

Answer 5

Antiskid protection is provided in the normal and alternate brake systems. Both normal and alternate brake systems provide skid, locked wheel, touchdown and hydroplane protection.

Note: Antiskid protection is available even with loss of both hydraulic systems.

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Question 6

Describe the Brake System

Answer 6

Normal Brake System
- is powered by hydraulic system B
- Anti-skid and autobrakes are available

Alternate Brake System
- is powered by hydraulic system A
- if hydraulic system B is low or fails, hydraulic sytem A automatically supplies pressure to the alternate brake system
- Anti-skid is available but autobrakes are INOP

Brake Accumulator
- is pressurized by hydraulic system B
- If both normal and alternate brake system pressure is lost, trapped hydraulic pressure in the brake accumulator can still provide several braking applications or parking brake application
- Autobrakes are INOP

Autobrake System
- Uses hydraulic system B pressure to provide maximum deceleration for rejected takeoff and automatic braking at pre-selected deceleration rates immediately after touchdown
- system operates only when the normal brake system is functioning
- Anti-skid system protection is provided

Parking Brake
- Can be set with either system A or B hydraulic systems pressurized
- if A and B hydraulic systems are not pressurized, parking brake pressure is maintained by the brake accumulator. (Accumulator pressure is shown on the HYD BRAKE PRESS indicator)

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Question 7

Recall how the autobrakes can be disarmed

Answer 7

• Moving the SPEED BRAKE lever to the down detent
• Advancing the forward thrust lever(s), except during the first 3 seconds after touchdown
• Applying manual brakes
• Moving the selector switch to the OFF position

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Question 8

True or False:
Alternate brakes are available automatically in the event of a hydraulic system B loss

Answer 8

TRUE

ESV-SA: Landing Gear

Question 9

How are the landing gear verified “Down and Locked?”

Answer 9

Landing gear is down and locked as long as one green landing gear indicator light (center panel or overhead panel) for each gear is illuminated

ESV-SA: Landing Gear

Question 10

True or False:
Both normal and alternate brake systems provide ski, locked wheel, touchdown and hydroplane protection?

Answer 10

TRUE

ESV-SA: Landing Gear

Question 11

What will cause the ANTISKID INOP light to illuminate?

Answer 11

A system fault is detected

ESV-SA: Landing Gear

Question 12

If A and B hydraulic systems are not pressurized, parking brake pressure if maintained by:

Answer 12

The brake accumulator

Check your knowledge - Landing Gear CBT