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KV-107 Systems > Hydrualic System > Flashcards

Hydrualic System Flashcards

1
Q

How many hydraulic systems are there?

A

2, identical but independent

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2
Q

What pressure and rate does each system supply?

A

1500psi

4GPM

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3
Q

What happens if one system fails?

A

Second system will completely support all hydraulic demands

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4
Q

How is hydraulic fluid supplied to the SAS extensible links?

A

SAS control shut off valve

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5
Q

Explain the hydraulic reservoirs

A 
Two tanks. 
0.94 capacity per tank
Low fluid switch for each tank (approx 1/4 remains) 
Fill cap and level gage for each tank
Pressure relief valve per tank (inside)
Serviced with 5606 hydraulic fluid
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6
Q

What type of hydraulic pumps do we have?

A

Constant pressure variable rate pumps. Will vary flow rate to maintain pressure

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7
Q

What is mounted to the hydraulic pumps?

A

Seal leakage drain that drips into forward transmission drip pan

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8
Q

Where are they hydraulic pumps mounted?

A

Bottom of forward transmission

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9
Q

How is hydraulic power provided to the lower dual stick boost actuators?

A

Stick boost manifolds (2)

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10
Q

How many filters are there in the hydraulic system?

A

9

4 pressure filters
2 case drain
2 return
1 vent

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11
Q

Where are the case drain and return filters located?

A

In front of forward transmission.
Return outboard
Case drain inboard

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12
Q

Where are pressure and vent filters located?

A

2 pressure on aft potion of fwd transmission deck.

2 pressure in SAS closet

1 vent in cockpit behind LH pilots seat

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13
Q

Do pressure filters bypass?

A

No

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14
Q

When will all filters pop the pressure differential indicator?

A

60-80PSI

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15
Q

Describe the hydraulic accumulator.

A

500+/-25 psi nitrogen pre charge
25 square inch floating piston type
Direct reading pressure gauges located in companionway
Absorbs large hydraulic demands in system

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16
Q

How do lower boost actuators work?

A

Flight control rod moves operating valve. 1500 PSI is directs to proper side of dual pistons. Each hydraulic system provides power to 1 piston.power piston moves and imparts controls movement. Once proper amount of control movement has occurred the operating valve mechanically re-centers.

17
Q

What happens to the boost actuator if one hydraulic system fails?

A

Side that’s failed is set to fluid bypass to prevent hydraulic lock. Other power piston functions normally

18
Q

How are the hydraulic pressure gauges powered?

A

26VAC 400 HZ

19
Q

What is a snubber?

A

Located just prior to hydraulic pressure transmitter, stabilizes pressure reading to the gauges

20
Q

When do the hydraulic pressure switches activate? What do they do?

A

1000 psi
HYD BOOST FAIL master caution light
Set opposite SAS to full gain

21
Q

What is the min/max operating pressure of the hydraulic system?

A

1050-1750psi

KV-107 Systems (12 decks)

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