SY1101 System Overview

Question 1

T38C has ___ Generators that are mounted where?

Answer 1

two, left and right located on gearboxes

Question 2

DO the generators produce AC or DC? What changes the AC to DC?

Answer 2

• AC (alternating current)

- The Transformer rectifier units (TRUs 2)

Question 3

How many buses do the TRUs power? What powers these buses when TRUs are offline?

Answer 3

• 2 essential and 1 non-essential

- 24 V lead acid battery

Question 4

Other than the DC buses what other bus does the battery power? (What’s on this bus?)

Answer 4

• The Battery Bus

- Static inverter, engine start controls, AB ignition

Question 5

Fuel System hold ____ Gallons/ lbs?

Answer 5

583, (3906 ilbs) via single point refueling

Question 6

How much less fuel do you get with manual refueling?

Answer 6

6 Gallons/ 40 lbs less

Question 7

What does the Utility hydraulic system control

Answer 7

flight controls, landing gear, speed brake, nosewheel steering and stability augmentor

Question 8

What does the flight control hydraulic system control

Answer 8

Ailerons, rudder, horizontal stab

Question 9

What is airframe constructed of?

Answer 9

Aluminum and aluminum-magnesium alloy

Question 10

What provides the force for the flight controls to move?

Answer 10

Dual hydraulic systems

Question 11

Shape of the fuselage

Answer 11

Area rule (coke bottle)

Question 12

How many AC generators are there?

Answer 12

2

Question 13

Where are the 2 AC generators mounted and located?

Answer 13

Mounted at the rear on airframe mounted gearboxes

Question 14

The AC generators normally carry ___ the total electrical load

Answer 14

half

Question 15

Can one AC generator carry the entire electrical load?

Answer 15

Yes

Question 16

What supplies DC power?

Answer 16

2 Transformer Rectifier Units (TRU)

Question 17

What does the TRU do?

Answer 17

Converts AC to DC

Question 18

How many and what types of buses do the TRU’s power?

Answer 18

2 essential DC buses and 1 non-essential DC bus

Question 19

Where do the TRU’s get their power from?

Answer 19

AC electrical buses

Question 20

What provides DC power when the engines are not running?

Answer 20

24-volt lead-acid battery

Question 21

What 3 items does the battery provide power to the battery bus for?

Answer 21

Static inverter, engine start control, and afterburner ignition control

Question 22

External power provides what type of power to the T-38?

Answer 22

AC which powers the TRUs providing DC power

Question 23

Where is most electrical equipment located?

Answer 23

Nose section

Question 24

What 3 pieces of electrical equipment are located in the nose section?

Answer 24

Battery, TRUs, and COMM/NAV

Question 25

How is the elctrical equipment in the nose cooled on the ground and in the air?

Answer 25

Electric fan on the ground, ram air and cockpit air when airborne

Question 26

What do the engines do besides provide thrust?

Answer 26

Supply power to accessories included the airframe mounted gearboxes

Question 27

Each engine continues what 2 self-contained systems?

Answer 27

Fire and Lubrication

Question 28

What does the T-38 require for engine starting?

Answer 28

Low-pressure air from a JASU, APU, or CASS

Question 29

What is the quantity(lbs, and gallons) of the fuel system?

Answer 29

583 gallons, 3,906 lbs

Question 30

How much fuel is lost using the "over the wing" method?

Answer 30

6 gals (40 lbs)

Question 31

T/F Each engine has its own independent fuel supply system.

Answer 31

True

Question 32

What is the purpose of the fuel crossfeed valve?

Answer 32

Connect the engines to either fuel system

Question 33

What are the names of the 2 fuel pumps for each engine?

Answer 33

Electrically-powered boost pump and engine-driven fuel pump

Question 34

Can the engine operate without the engine-driven fuel pump?

Answer 34

No

Question 35

Can the engine operate without the boost pump?

Answer 35

Yes, via gravity feed

Question 36

Where are all fuel system switches located?

Answer 36

FCP

Question 37

What are the 2 hydraulic called?

Answer 37

Flight Control | Utility

Question 38

Are the flight system and utility system independent?

Answer 38

yes

Question 39

The flight hydraulic system is powered by which side?

Answer 39

Right engine

Question 40

The utility hydraulic system is powered by which side?

Answer 40

Left Engine

Question 41

If 1 of the 2 hydraulic systems fails, will the flight controls continue to be powered?

Answer 41

Yes

Question 42

Which hydraulic system powers the wheel brakes?

Answer 42

Its own independent system

Question 43

What are the 4 other systems (besides flight controls) powered by the Utility hydraulic system?

Answer 43

Landing gear, speed brake, NWS, and stability Augmentor system

Question 44

What are the 3 main unsafe gear warnings for the gear system?

Answer 44

Red light in handle, aural tone, GEAR on HUD/MFD

Question 45

Does the alternate gear extension work without electricity or hydraulics?

Answer 45

Yes

Question 46

Where is the alt gear extension handle located and how does it work?

Answer 46

Front cockpit, gravity/slipstream

Question 47

What system operates the speed brake and how is it controlled?

Answer 47

Hydraulic system, DC electric switch

Question 48

What 2 conditions will disengage NWS?

Answer 48

Start button pressed, AB selected

Question 49

What two things have to be on for the Stability Augmentation System (SAS) to work?

Answer 49

EGI switch on AAP on; yaw damper switch

Question 50

What is the purpose of the SAS?

Answer 50

Stabilize aircraft about the vertical axis

Question 51

How are the FCP and RCP controls connected?

Answer 51

Mechanically

Question 52

What do the flight controls connect to to actuate the control surfaces?

Answer 52

Connected by cables and pushrods to hydraulic servo valve

Question 53

How many electric flap motors are there?

Answer 53

2

Question 54

If one electric flap motor fails, how will both flaps still come down?

Answer 54

yes by the Mechanical connection with rotary shaft

Question 55

What are the 5 main functions for bleed air in the T-38?

Answer 55

Pressurization, air-conditioning, defogging, G-suit, and pressurize hydraulic reservoirs

Question 56

What occurs automatically when canopies are closed and locked?

Answer 56

Pressurization

Question 57

What happens to the bleed air used to pressurize the cockpit?

Answer 57

It is pre-cooled by the AC unit

Question 58

Which cockpit contains all of the environmental controls?

Answer 58

FCP

Question 59

What are the 4 main components of the avionics suite?

Answer 59

HUD, UFCP, MFD, EED