Hydraulics

Question 1

Describe the hydraulic system

Answer 1

Two engine driven, variable flow 3000 psi pumps located on the accessory gearbox provide required hydraulic power to operate components. – An accumulator provides additional flow when required. – Two fire shut off valves activated by the fire shut off switch is isolate the hydraulic fluid from an engine fire situation. – A pressure transducer sends system pressure to the hydraulics Synoptics page. – Two temperature switches to warn of high fluid temperature condition

Question 2

Describe how to check the hydraulic fluid quantity

Answer 2

Shut down engines and dump parking brake accumulator with wheels chocked

Question 3

Describe what affect an engine failure will have on the hydraulic system

Answer 3

None. The remaining pump can support the entire system

Question 4

Describe the function of the priority valve

Answer 4

Restricts flow to landing gear in the case of multiple subsystem actuations

Question 5

List the hydraulic components of a phenom 300

Answer 5

Landing gear - multifunction spoiler - main brake - stick pusher - emergency/parking brakes – spring loaded rudder boost

Question 6

Describe the function of the hydraulic system accumulator

Answer 6

Cylindrical separated-piston supplies additional flow demand
During simultaneous brake application and ground spoiler actuation
OR
During pressure transients where the engine driven pumps capacity is exceeded

Question 7

Describe win the fire shut off valve will close

Answer 7

Switch to close, fire shut off button is pressed, both fire shut off valves will close in the high temp condition