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Q400 > Q-HYDRAULICS > Flashcards

Q-HYDRAULICS Flashcards

0
Q

What services are provided from # 2 HYD system ? 12usq

HINT “LONERE

A

GONERE

LANDING GEAR 
OBD SPOILER 
EMERG BREAKE 
RUDDER (upper PCU)
ELEVATOR (center PCU)
NOSE STEERING
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1
Q

What services are operated from #1 HYD ? 8usq

HINT “FAIRE”

A

FAIREP

FLAP 
ANTI-SKID / Breaks 
INBD ROLL SPOILER 
RUDDER (lower PCU ) 
ELEVATOR LH/RH outboard PCU
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2
Q

What is the MIN HYD quantity for dispatch ?

HINT “%”

A

40 %

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3
Q

Where is the STDBY PUMP pressure indication ?

A

PRESSURE INDICATION ON PSA ( PERMANENT SYSTEM AREA )

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4
Q

Where are the PTU pressure indications displayed ?

A

On the switch itself

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5
Q

What is the # 3 HYD system for ?

A

For backup elevator trim

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6
Q

When is the # 3 HYD system used ?

A

Whenever one of the elevator PTU’s fail

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7
Q

What does the AUX hand operated pump operate ?

A

The emergency main gear landing gear extension.

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8
Q

How is the # 1-#2 pressurized ?

A

By the engine driven pump on the reduction gear box at a pressure of 3000 PSI

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9
Q

The standby hydraulic pump functions on what ?

HINT “ BUSSES”

A

Is powered by the right AC buss with back up from the left AC buss for back up to the #1 hydraulics if the engine fails.

provides 2900PSI

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10
Q

The PTU is a back up for what and is powered by what ?

A

Is back up for the #2 hydraulics and is powered by the #1 hydraulics.
must be on for takeoff and landing

for it to work you must have fluid in both systems

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11
Q

The #3 back up hydraulics poweres what ?

A

The left elevator ( inboard PTU )

The right elevator ( inboard PTU )

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12
Q

What does a green/white advisory light on the HYD system indicate In terms of the position of the valve.

A

Green - open

White - closed

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13
Q

What powers the firewall shut off valves ?

HINT “BUSS”

A

The battery bus

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14
Q

What is the HYD ISOL VLV caution light ?

HINT “LEAK/ISOLATE”

A

It means there’s a leak and the system is loosing HYD fluid so the valve closes and

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15
Q

In HYD ISOL VLV situations what is the # 1 system limited too ? (REF)

A

Rudder
Elevator
Flap

16
Q

In HYD ISOL VLV situations what is the # 2 system limited too ? (RE)

A

Rudder

Elevator

17
Q

Will the STDBY HYD PUMP green switch turn on when the pump turns on automatically ?

A

No

18
Q

What is the priority valve ?

A

Is used if the pressure falls below 2100 psi in the #1 system so it closes the valve.

19
Q

With the priority valve closed, what systems are cut off in the #1 system ?

HINT “FP”

A

Flaps and PTU

20
Q

How does the # 3 HYD system work ? 2.6usq

HINT “MOTOR/SWITCHES”

A

Automatically by. DCMP 2 pressure switches.
One signals the pump to turn on if pressure drops to 2600 and stops at 3250
The other switch lights up the #3 STDBY HYD if the system falls below 900 psi ( in flight )

21
Q

Where does the DCMP get it’s power from ?

HINT “ONE OF THE BATTERIES”

A

The standby battery

22
Q

What is the accumulator isolation valve ?

A

Is a valve that isolates the elevators from the #3 HYD system pressure.
It’s energized closed. And opens when wither the #1-#2 HYD systems fail or the engines fail.

23
Q

What causes an ELEVATOR PRESS caution light.

HINT “STUCK OPEN”

A

The isolation valve is stuck open supplying #1-2 HYD system even though they’re operative.

24
Q

How does the alternate landing gear pump work ?

A

The hand pump draws HYD fluid from a auxiliary reservoir following the loss of the #2 HYD system.

25
Q

The STDBY HYD pump is turned to what for takeoff and landing ?

A

ON

it will come auto if the #1 engine fails in flight

or
#1 reservoir is not empty and park break is off and flaps are greater then 0deg and AC power is available
26
Q

What does the STBY HYD pressure operate ?

HINT “BACK UP”

A

Back up source to the # 1 HYD system

27
Q

Where is the heat exchanger for the HYD fluid ?

A

in the collector bay by the flapper valve

28
Q

If you loose #2 HYD system you maintain 3000PSI in the break accumulator

A

.

29
Q

THE FWSOV closes when ? Fire Wall

A

pulled
temp in reservoir is 275F
or reservoir is empty

before this happens the FLUID HOT light comes on

Q400 (37 decks)

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