Hydraulics

Question 1

What flight controls get all 3 hydraulic system power?

Answer 1

Elevators and rudders

Question 2

HMG normally powered by what hyd system normal and alt?

Answer 2

Left system, but can be right through the power transfer unit

Question 3

Normal and ALT brakes powered by?

Answer 3

Normal = right
Alt = left

Question 4

What can be powered by the right system through the PTU?

Answer 4

Flaps, slats, landing gear and nose wheel steering

Question 5

RSVR light means? (2)

Answer 5

Either low reservoir quantity or pressure

Question 6

Hyd OVHT means?

Answer 6

Overheated pump

Question 7

When does load shedding occur on C2 hyd pump?

Answer 7

With only one source of electrical power

Question 8

When does PTU automatically work? (2)

Answer 8

When left engine is shutdown or output pressure of left eng pump is low

Question 9

IF leak has caused loss of left system how does PTU still work?

Answer 9

There is a standpipe in the reservoir

Question 10

Can the PTU power the HMG?

Answer 10

Yes

Question 11

When is HMG valve open and HMG auto powered?

Answer 11

When both AC buses are lost

Question 12

With HMG operating does it take longer to use flaps and slats?

Answer 12

Yes

Question 13

How normal brakes protected if right system leak?

Answer 13

Stand pipe in reservoir

Question 14

What does isolation valve in reserve brake system do?

Answer 14

Makes sure reserve fluid is exclusively used for the brakes

Question 15

Below what hyd quantity does the RSVR light come on?

Answer 15

Below 0.5 on status

Question 16

When does RAT deploy automatically?

Answer 16

When both engines fail

Question 17

Above what speed does RAT provide adequate sys pressure for flight control portion of centre system?

Answer 17

130kts

Question 18

What hydraulics can the RAT provide services to?

Answer 18

Centre hyd system Flight controls