Hydraulics

Question 1

What pressure does the hydraulic systems maintain?

Answer 1

3000psi

Question 2

What do the hyd systems power?

Answer 2

• Primary flight controls: ailerons, elevators, rudder
• secondary flight controls: flaps/slats, multifunction spoilers, GND spoilers
• thrust reversers
• landing gear
• NWS
• RAT stow actuator

Question 3

Hyd sys 1 overview

Answer 3

Reservoir and accumulator
Eng driven pump (1A)
Back up pump (PTU)
Priority valve (ldg gear isolation to maintain px for flight controls and thrust reverser)

Question 4

Hyd sys 2 overview

Answer 4

Reservoir and accumulator
Eng driven pump (2A)
Back up pump (2B)
Priority valve (PTU isolation to maintain px for flight controls and thrust reverser)

Question 5

Hyd sys 3 overview

Answer 5

Reservoir and 2 accumulator
AC motor pump 3A
Back up ACMP 3B
RAT hyd pump
Priority valve (flaps/slats isolation to maintain px for flight controls)