Hydraulics Flashcards
Hydraulic system PSI
3,000 PSI
How many hydraulic systems EMB 120 have
Two green and blue
Are they hydraulic systems independent of each other
Yes
What is the is a probable cause to have Blue system to have more fluid than green
Poor technique. Parking brake transferred fluid form green system to blue system
With failed engine you see MAIN PUMP LOW PRESS and ELEC PUMP lights, why
MAIN PUMP LOW = PIS < 1,500 PIS
ELC PUMP = Electric pump is operating
FLITER light
Means that one of the 3 filters is bypassed. There are 4 filters and only 3 are monitored
Electric pump on battery limitation
20 seconds max. High drain on battery. No limitations when engines are running
What is sued to keep positive pressure in hydraulic reservoirs
P3 bleed air
What is powered by the green system
Gear
Rudder 1
Outboard Brakes
Outboard Flaps
Main door
Steering
What is powered by the blue system
Flaps inboard and nacelle
Inboard brakes
Rudder 2
Emergency brake
How can you shut off the hydraulic system
Pulling Fire T handle
How many times the main door be lowered hydraulically
4 times
What is the capacity of emergency brake
8-10 full actuations
When does hydraulic low pressure light comes on
1,500 PSI
What hydraulic filters are monitored
2 High pressure filters
Return filter
Backup return filter is not monitored
