Hydraulics Flashcards
How many hydraulic pumps does the CL-30 have?
6 total: 2 EDP’s, 2 DCMP’s, PTU, AUX pump
What is powered using the hydraulic system?
Brakes, Thrust Reversers, Flaps, Elevators, Rudder, Multi Function/Ground Spoilers, NWS
Normal hydraulic system pressure is _______?
3000 psi
What does the Left Hydraulic System power?
Gear, inboard MFS, inboard brakes, left(upper)PCU, alt flaps, inboard ground spoilers, left TR, nose steering, inboard elevator PCU’s
What does the Right Hydraulic System power?
Flaps, outboard MFS, outboard brakes, ground spoilers, lower PCU, outboard elevator PCU’s, Rt. TR, PTU, main landing gear assist actuator
What is the purpose of the PTU?
To provide pressure to the left system primarily to retract the gear after takeoff with a left engine failure
When does the PTU operate in ‘AUTO’?
- Left EDP failed
- Right EDP producing pressure
- Weight off wheels (WOW in air)
- Gear not in the selected position
How is hydraulic fluid cooled?
Via a fuel / hydraulic heat exchanger in each wing tank
Hydraulic SOV can be closed in 3 ways? List them….
- Pushing the PBA
- Pushing the FIRE PBA
- Hydraulic temperature exceeds 135 degrees C (275 degrees F) for more than 3 seconds.
What is the purpose of the Aux HYD system?
To provide hydraulic pressure to the lower rudder pcu if the right hydraulic system loses pressure
In the event generator power fails and both EDP’s fail, which DCMP is not load shed and can be powered?
The right DCMP if switch is selected to ON
When would we use the Alternate flaps?
When directed by the checklist for Right hydraulic pressure low conditions or Flap Fault CAS
After loss of the left and right hydraulic systems, what flight control is operated via the Aux hydraulic system?
The rudder thru the lower rudder pcu
What accumulators are in the hydraulic systems?
4 – Inboard/Outboard brakes, Aux system, and main gear down lock assist
Why does flap extension using only the Right DCMP or Alternate Flaps take much longer than normal?
EDP pumps approximately 20 gpm, DCMP approximately 3 gpm
When does the Aux Hydraulic pump automatically turn ON?
Aux system pressure less than 2500 psi (OFF at 3350 psi)
When do the DCMP’s operate in the auto position?
Low hydraulic system pressure, when flaps are selected out of 0, and on the ground with NWS ON (Left DCMP)
Which electrical buses power the Right and Left DCMP’s?
- Right DCMP is powered from L ESS bus
- Left DCMP is powered from R Main bus
On A/C not modified with SB 100-29-18 (Brushless DCMP’s), what position do we place the DCMP switches after takeoff?
OFF
On CL350’s and A/C modified with SB 100-29-18 (Brushless DCMP’s) what position do we place the DCMP switch after takeoff?
Remain in the ‘AUTO’ position
