E190 - Hydraulic

Question 1

What happens if you press the ENG PUMP SHUTOFF switch ?

Answer 1

The hydraulics SOV is closed.

Question 2

What does it mean if the hydraulic fuel quantity and scale is cyan ?

Answer 2

It requires refilling.

Question 3

Are flight-critical functional impaired in case of loss of two hydraulic systems ?

Answer 3

No.

Question 4

Hydraulic system 1 supplies the following systems:

Answer 4

• rudder (upper)- elevator (LH outboard)- MFS (#3 and #4)- GS (#2)- outboard braking
• emergency / parking brake- thrust reverser #1

Question 5

The HYD HI TEMP msg is shown for all hydraulic systems when temperature exceeds:The NNC will direct you to turn off:

Answer 5

100°C.ACMP 1B OR ACMP 2B OR ACMP 3A.

Question 6

If the hydraulic fluid temperature exceeds125°C, what will happen automatically for each hydraulic system ?

Answer 6

System 1 & 2: SOV closed (EDP isolated).System 3: shutdown both hydraulic pumps.

Question 7

The HYD OVERHEAT msg is shown for all hydraulic systems when temperature exceeds:TheNNCwill direct you to:

Answer 7

145°C.shutdown both pumps for the affected system.

Question 8

The hydraulic ACMP’s are powered by which bus:

Answer 8

ACMP 1B - AC BUS 2ACMP 2B - AC BUS 1ACMP 3A - AC ESS BUSACMP 3B - AC BUS 2

Question 9

ACMP 1B or ACMP 2B is activated automatically in-flight when:

Answer 9

• Flaps extended- EDP (or engine) failure- 60 sec during landing operations:

Question 10

ACMP 1B or ACMP 2B is activated automatically during T/O :

Answer 10

For 60 sec(TO thrust or GS > 50 kts).

Question 11

ACMP 2B (only) is activated automatically for ground operations:

Answer 11

• Eng 1 running and PB released, or- Eng 1 starting, if PB was applied the last 6min

Question 12

What will the FADEC do with the EDP in case of an engine flame-out ?

Answer 12

It will depressurize the EDP, in order to facilitate a windmill start.

Question 13

Hydraulic fluid is filtered two times:

Answer 13

• In the filter manifold- In the return line.

Question 14

Hydraulic fluid is cooled:

Answer 14

In a heat exchanger in the fluid return line.

Question 15

Hydraulic system 2 supplies the following systems:

Answer 15

• aileron (inboard)- elevator (inboard)- MFS (#5)- GS (#1)- inboard braking
• emergency / parking brake- landing gear
• nose wheel steering
• thrust reverser #2

Question 16

Hydraulic system 1 and 2: which hydraulic system has the largest reservoir ?

Answer 16

Hydraulic system 2.

Question 17

What is the PTU and it’s purpose ?

Answer 17

It consists of a hydraulic motor in system 1 that drives a hydraulic pump in system 2. Fluid is NOT transferred. It assist in operation of the landing gear in case of a right engine/EDP failure.

Question 18

Can the PTU be activated on the ground ?

Answer 18

No.

Question 19

The PTU is automatically activated when:

Answer 19

• ENG 2 OR EDP 2 fails- Gear OR flaps not up- EDP 1 operational- Hydraulic reservoir 2 > 12%! The PTU does not activate on the ground

Question 20

In an electrical emergency, is ACMP 3B still available ?

Answer 20

No.

Question 21

In an electrical emergency, is overheat protection still available for hyd system 3 ?

Answer 21

No. The HI TEMP / OVERHEAT messages are disabled together with the pumps being turned off automatically > 125° C

Question 22

ACMP 3B is turned on automatically in-flight when:

Answer 22

ACMP 3A fails.

Question 23

In a dual engine failure, you will lose hyd. systems 1 and 2. ACMP 3A is powered by the AC ESS BUS (RAT), however it takes 8sec for the AC ESS BUS to be powered. In the mean time to control the airplane:

Answer 23

Hydraulic system 3 accumulator pressure provides pressure to the associated flight controls.

Question 24

Hydraulic system 3 has two dedicated valves, used in in electrical emergency, in order not to overload the RAT:

Answer 24

• Pump unloader valve (reduce discharge pressure during startup)
• Flow limiter valve
  (reduce the flow)