Hydraulics

Question 1

Which sevices can be operated by the Standby Hydraulics?

Answer 1

Thrust Reverses, LE devices (extend), standby rudder, and standby yaw damper

Question 2

Under what conditions will the PTU operate?

Answer 2

Flaps less than 15 but not up, airborne and No 2 EDP pressure low

Question 3

What is the minimum qty of fuel in the related wing tank for electrical hydraulic pump operation on the ground?

Answer 3

760kg

Question 4

Should a leak develop in an EDP or its associated lines how is complete loss of fluid prevented on Hyd A?

Answer 4

A standpipe in the reservoir supplies the EDP to prevent a total fluid loss

Question 5

What conditions would cause the standby hydraulic system to operate automatically?

Answer 5

Loss of A or B system with the flaps NOT UP and airborne or a wheel speed greater than 60kts or a Force Fight Monitor trip.

Question 6

When will the Landing Gear Transfer Unit operate?

Answer 6

Loss of RPM on No1 engine, airborne, gear selected UP and either main gear not up.

Question 7

At what point wil the low quantity light appear for the standby hydraulic system?

Answer 7

Aprox half full

Question 8

What degradation to primary flight controls occur with the loss of hydraulics systems A OR B

Answer 8

No degradation

Question 9

In total hydraulic failure how can the flight spoilers be operated?

Answer 9

They can’t!