Ch.13 (Hydraulics)

Question 1

Where are the hydraulic systems fluid reservoirs located?

Answer 1

Main wheel well area

Question 2

What pressurizes the system A and B reservoirs?

Answer 2

By regulated bleed air

Question 3

What pressurizes the standby system reservoir?

Answer 3

Pressure from Hyd system B

Question 4

When do the letters RF (white) appear?

Answer 4

When HYD quantity is below 76% (REFILL). Indication is only valid when on the ground,
no engines running or after landing with flaps up during taxi in

Question 5

What does the ELEC 2 pump ON/OFF switch control?

Answer 5

Controls the related electric motor driven pump

Question 6

What happens when an ENG hydraulic pump switch is turned off?

Answer 6

Closes the blocking valve. Pressure maintained by electric motor driven pump

Question 7

What is normal hydraulic system pressure? Max pressure?

Answer 7

• Nominal: 3000 +/- 200PSI

- Max: 3500PSI

Question 8

What does the OVERHEAT (amber) light on the hydraulic panel indicate?

Answer 8

Electric pump overheat

Question 9

9. What is the purpose of the PTU?

Answer 9

To provide HYD SYS B fluid at a flow rate and pressure that is sufficient to provide
normal operation of the autoslats and Leading Edge devices in the event the HYD SYS B ENG driven pump fails to provide sufficient pressure

Question 10

Does System A or B pressure loss alone cause automatic operation of the standby hydraulic system?

Answer 10

No

Question 11

What could cause automatic operation of the standby hyd system?

Answer 11

Must have flaps extended and be airborne or wheel speed greater than 60 kts with
respective FLT CONTROL switch positioned ON

Question 12

Which switches activate the standby system for operation of the rudder and thrust reversers?

Answer 12

The FLT CONTROL switches placed to STBY RUD

Question 13

What does the STANDBY HYD LOW QUANTITY (amber) light indicate?

Answer 13

Standby reservoir quantity less than 50%