Chapter 6.130 - Hydraulics

Question 1

What items are on hydraulic system A?

Answer 1

• Flight controls
• Thrust reverser
• Flight spoilers
• Alternate brakes
• Nose wheel steering
• Landing Gear
• Ground Spoilers
• Autopilot A

Question 2

What items are on hydraulic system B?

Answer 2

• Flight controls
• Thrust reverser
• Flight spoilers
• Normal brakes
• LED’s
• TED’s
• Yaw Damper
• Autopilot B

Question 3

What is lost with A hydraulic system?

Answer 3

G - Ground spoilers
I - Inboard flight spoilers
N - Nosewheel steering
A - A autopilot

Question 4

What is lost with B hydraulic system?

Answer 4

A - Autobrakes
B - B autopilot
O - Outboard flight spoilers
Y - Yaw damper

Question 5

What are the quantities and sources of leaks for the A system standpipes?

Answer 5

• 20% with a leak in engine driven hydraulic pump or lines

- 0% with a leak in electric driven hydraulic pump or lines

Question 6

What are the quantities and sources of leaks for the B system standpipes?

Answer 6

• 72% with a leak in the standby hydraulic pump

- 0% with a leak either in engine or electric hydraulic pumps or lines

Question 7

At what quantity will the amber standby hydraulic LOW QUANTITY light illuminate?

Answer 7

When standby hydraulic reservoir is at 50%

Question 8

What does the power transfer unit (PTU) supply?

When will it operate?

Does the PTU allow fluid transfer?

Answer 8

PTU uses system A pressure to drive system B fluid to move LED’s

System B engine driven hydraulic pressure to drop below limits

No, there is no fluid transfer

Question 9

What does the landing gear transfer unit (LGTU) supply?

When will it operate?

Does the (LGTU) allow fluid transfer?

Answer 9

LGTU uses system B fluid to raise the landing gear when system A fluid is lost

Number 1 engine RPM drops below limits

Yes, there is fluid transfer