Hydraulics

Question 1

When STANDBY RUD is activated what happens?

Answer 1

• Engages motor driven pump for standby system
  -Isolates Aileron, Elevator, and Rudder
• Opens SOV to Standby System
  -Powers Thrust Reverser and Rudder
  -Extinguishes LOW PRESSURE for Appropriate system
  -Arms LOW PRESSURE for Standby system
  -STBY RUD ON illuminates which results in FLT CONT and Master Caution

Question 2

Automatic activation of standby hydraulic system occurs when?

Answer 2

Failure of A and or B system when the flaps are extended.
- Airborne OR
- Wheel Speed is greater than 60 kgs

Force Flight Monitor trips

Question 3

What does the stand hyd system operate?

Answer 3

Rudder, Thrust Reversers, LE devices via manual flap extension,