Hydraulics

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Normal hydraulic power is provided by:

Engine driven pumps for green and yellow, electric pump for blue, electric pump for yellow (ground operation only)

The power transfer unit (PTU) is:

Reversible between green and yellow

In flight, if blue electric pump fails, blue system:

Can be recovered by RAT

With both engines stopped, how is it possible to pressurize the green system?

By the yellow electric pump and the PTU

The Ram Air Turbine (RAT) is automatically extended in case of:

Loss of (ENG and APU) main generators

On ground, the blue system is pressurized when:

One engine is running

Engine 2 energizes:

The yellow system pump and the green system via the PTU, should the green system pump fail

The yellow system comprises of:

One engine driven pump, one electric pump, one hand pump

The priority valves operate in case of:

Low hydraulic pressure

The fire shutoff valves shut off:

The yellow and green systems

The hydraulic reservoirs are pressurized:

From the LH engine or the pneumatic manifold

If on ground with ENG 1 stopped, does the ENG 1 PUMP FAULT light illuminate amber due to green pump low press?

In case of reservoir overheat, the fault lights of the faulty system stay on:

As long as the overheat is detected

On ground and before engine start, with blue pump auto and AC power available, the blue pump is:

Energized when the blue pump OVRD p/b is pressed

The blue system includes operation of:

The slats

The RAT, when extended in flight, pressurizes:

The blue system

The yellow system may be powered by:

ENG 2 hydraulic pump, or the yellow electric pump, or the PTU

The yellow system includes operation of:

The flaps

During first engine start, the PTU is:

Inhibited

The Ram Air Turbine (RAT) can be restowed:

On ground only

In flight, the Ram Air Turbine (RAT) is extended:

Manually or automatically

In flight, when the Ram Air Turbine (RAT) is automatically extended:

The blue hydraulic system is pressurized and the emergency GEN runs

Is it possible to interchange hydraulic fluid from green to yellow system or vice versa?

The hydraulic fire shut off valve closes when:

The fire pushbutton is released out

If the green system is lost, slat operation is:

Slow

If the green system is lost, flap operation is:

Slow

The green system operates:

The reverser 1

The yellow system operates:

The reverser 2

On ground, blue ELEC PUMP pushbutton in AUTO, the circuit is energized if:

One engine is running or blue pump OVRD pushbutton has been pressed

If blue system is lost, the slats are:

Slow

If blue system is lost, the flaps are:

Normal

Yellow ELEC PUMP pushbutton switch OFF and cargo door manual selector valve set at OPEN or CLOSE position, the PTU and the flight controls are:

Inhibited

If yellow system is lost, the slats are:

Normal

If yellow system is lost, the flaps are:

Slow

The ENG 2 FIRE SHUTOFF valve is between the yellow reservoir and:

The ENG 2 hydraulic pump

In case of single hydraulic system low press:

The master CAUTION light illuminates and a single chime sounds

With green hydraulic system lost:

The landing gear must be extended by gravity

With green hydraulic system lost, the braking system is:

Alternate

With the PTU in AUTO, the PTU automatically runs:

When differential pressure between green and yellow system is more than 500 psi

With only the green hydraulic system only remaining, the horizontal stabilizer is:

Available

With green and yellow hydraulic systems lost, manual pitch trim is:

Lost

With only the green hydraulic system only remaining, the auto brake is:

Available

Hydraulic blue system only remaining:

Seven full brake applications are available

The load alleviation function accumulators operate in case of high demands on:

The yellow and green powered spoilers 4 + 5 and ailerons

In case of blue electric pump failure, when the Ram Air Turbine (RAT) MAN on pb is pressed:

The blue hydraulic system is pressurized by the RAT

In flight, the ENG 1 pump fault light illuminates amber in case of: a reservoir low level, or a reservoir overheat, or a reservoir low air press, or a pump low press:

Yes

The yellow system includes operation of:

The right elevator only

The green system operates:

Spoilers 1 and 5

The green system operates:

The left elevator

The green system operates:

Both

The blue system operates:

Spoiler 3

The Ram Air Turbine (RAT) can be extended:

Both

The blue system operates:

Both

Can you operate a cargo door when no electrical power is available?

Yes, via a hand pump

The yellow system operates:

The spoilers 2 and 4

In case of RSVR LO AIR PR, the hydraulic system affected is:

May be recovered after descending to a lower altitude

With a single hydraulic system failure, the flight control law is:

Normal

With green hydraulic system lost:

The NWS is operative

With green hydraulic system lost, the anti-skid is:

Operative on the yellow hydraulic system

PTU running, the pressure delivered by the PTU is:

Stable at 3000 psi

Hydraulic green system only remaining, the autopilot punctuation is:

Lost

Which hydraulic systems have a Fire Shutoff Valve?

Green and Yellow

What is the purpose of the priority valves?

Priority valves cut off hydraulic power to heavy load users if hydraulic pressure in a system gets low

When will the RAT deploy automatically?

If AC BUS 1 and AC BUS 2 are both lost

Which hydraulic systems have a pump that is driven by an engine?

Green and yellow

The PTU runs automatically when delta P between the green and yellow system is more than 500 psi:

During green or yellow system low pressure

In flight, the Blue hydraulic system can be supplied by:

The RAT and the electrical pump

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