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T-38 Cards > Systems - Hydraulics > Flashcards

Systems - Hydraulics Flashcards

1
Q

How many hydraulic systems?

A

Two Hydraulic Systems With Two Engine Driven Hydraulic Pumps

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2
Q

How are reservoirs pressurized?

A

8th Stage Bleed Air from Engines

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3
Q

Airframe Mounted Gear Box

A

Powers Hydraulic Pumps

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4
Q

Left Engine Powers the

A

3,000 PSI Utility System

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5
Q

Right Engine Powers the

A

3,000 PSI Flight Control System

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6
Q

Pressure Indicators and Caution Lights are

A

Independent to Each System

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7
Q

Flight Control Hydraulics consist of

A

Flight controls

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8
Q

Utility Hydraulics consist of

A

FANGS

  • Flight Controls
  • Augmentation (SAS)
  • Nose Wheel Steering
  • Gear Extension/Retraction
  • Speed Brake
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9
Q

Pressure Indicators powered by

A

AC

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10
Q

Low Pressure

A

1,500 PSI Illuminates and 1,800 PSI is Needed to Terminate

- 35 Minutes If Either System Reads 0 PSI

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11
Q

High Temperature

A

Normal Temperature is Needed to Terminate

- Caused by Faulty Pressure Regulator or Line Restriction

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12
Q

Airframe Mounted Gearbox

A

Operates Hydraulic Pump and AC Generator

  • Shift Mechanism Maintains AC Output Between 320 and 480 Cycles Per Second
  • Gearbox Shift Occurs Between 65% and 75% RPM
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13
Q

Rudder System Trim

A

Provides 2° Deflection, Only Operable with SAS in YAW DAMPER

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14
Q

Rudder Limiter

A
  • Nose Gear is ¾ or Less Extended, Rudder Deflection is Limited to 6° From Neutral in Either Direction
  • Nose Gear is More than ¾ Extended, Full Rudder Deflection of 30° From Neutral in Either Direction
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15
Q

Trim System

A
  • AC Motors
  • Takeoff Trim System Sets the Horizontal Tail Trim to the Optimum Takeoff Setting
  • When the Push button is Held, the Motor Will Move the Trim Until the Neutral Trim Light Illuminates
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16
Q

What does the Stability Augmenter System do?

A

Uses Utility Hydraulic System to Position the Rudder to Reduce Yaw Oscillations

17
Q

How is SAS turned on and off?

A

EGI Mode Switch on the AAP

18
Q

Manual Rudder Trim is Accomplished Through the

A

Yaw Damper

19
Q

How is flap system operated?

A

Two AC Electric Motors
Interconnected by a Rotary Flexible Shaft
- If One Flap Motor Fails, Both Flaps are Actuated Through the Rotary Shaft
- Flap Extension Time is Much Longer With One Motor Failed

20
Q

What does Flap-Horizontal Tail Interconnect System (FLAP-SLAB) do?

A
  • Maintains Aircraft Handling Qualities Regardless of Flap Position
  • Majority of Compensation Occurs in the First 35% of Flap Deflection
  • Interconnect System:
    - Repositions Horizontal Tail to Eliminate Pitch Changes Caused by Flap Movement
    - Increased Horizontal Tail Deflection in Nose Down Direction When Flaps are Lowered
    - Increases the Amount of Horizontal Tail Deflection Per Inch of Stick Travel
21
Q

Flaps Lever and Position Indicator

A
  • Levers are Mechanically Interconnected by Cables
  • FCP Lever Actuates the Electrical Switch that Operates the Two Flap Motors
    = Position Indicator Operates on DC Power and Reflects Right Flap Position Only
22
Q

Auxiliary Flap Control Switch

A
  • Provides NORM and EMER Positions of the Flaps
  • NORM – Provides Flap Settings of 0%, 60%, and 100%
  • EMER – Provides Any Flap Setting Specified by the Flap Lever
23
Q

How is speed brake powered?

A

DC Controlled, Hydraulically Activated Dual Surface Speed Brake

24
Q

Provides ____ Speed Brake Positions Other Than Fully Extended

A

Intermediate

25
Q

Speed brake: Three Position Switch

A

EXTEND – OFF – RETRACT

26
Q

The RCP Speed Brake Switch Can ____ the FCP Switch, But is Spring Loaded to the OFF Position

A

Override

- For FCP To Regain Control, Move Switch to OFF Then Back to Appropriate Position

27
Q

Speed Brake Creep Can Be Prevented By

A

Setting FCP Speed Brake Switch to the Same as RCP

28
Q

Speed brake: What happens if you have DC failure?

A

SB is immovable

29
Q

NWS is ____ once alternate gear extension used

A

Unavailable

30
Q

Nosewheel Steering Switch (NWS)

A
  • Electrically Controlled by the Nosewheel Steering Switch on the Stick
  • Nosewheel Steering is Deactivated When Throttles are Advanced to MAX
  • Automatically Deactivates While Weight is Not on the Nosewheel
31
Q

Wheel Brake System

A
  • Segmented Rotor Type Brakes
  • Powered by a Separate, Completely Self-Contained Hydraulic System
  • Each Brake Pedal Controls a Hydraulic Master Cylinder
  • Control of the Brakes Transfers to the Crew Member Applying More Force
  • End of Life Indicated by Top of the Nut Being Less Than Flush With the Top of the Cylinder

T-38 Cards (3 decks)

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