Systems (GROUND SCHOOL)

Question 1

What kind of engine does the th-73 have?

Answer 1

PT6B-37A turboshaft

Question 2

From the reduction gear box, the tail rotor shaft inserts into the tail rotor gear box at a ______?

Answer 2

90 deg angle

Question 3

What is the purpose of the reduction gear box?

Answer 3

Reduces speed from power turbine and provides input/output to main transmission and tail rotor

Question 4

The Combustion Chamber _______________.

Answer 4

Mixes fuel and air and ignites it.

Question 5

At what percentage of N1 does the starter drop out?

Answer 5

43% N1

Question 6

Starter: What starts spinning fast?

Answer 6

Gas generator turbine

Question 7

What does manual mode require the pilot to do?

Answer 7

Coordinate twist grip

Question 8

What mode do we always fly in?

Answer 8

EEC (electronic engine control)

Question 9

What ITT for hot start?

Answer 9

870°C

Question 10

What is the configuration for the fuel cells?

Answer 10

1 upper fuel tank
2 lower fuel tanks
(3 total)

Question 11

T/F:
If both boost pumps fail, the engine will also fail.

Answer 11

False (there still is the engine driven fuel pump)

Question 12

What is the main concern with loss of transfer pump?

Answer 12

Lose the fuel in cell 2 (cant use it) (can’t transfer to No 1 and subsequently to the engine)

Question 13

How many minutes of flight with FUEL LO caution?

Answer 13

10 minutes (at max continuous power)

Question 14

How many pounds of fuel with FUEL LO caution?

Answer 14

100 lbs.

Question 15

Rotor brake system powered by ___________.

Answer 15

A dedicated reserve pump - independent hyd sys

Question 16

CAS messages are displayed how?

Answer 16

Warnings on top, then cautions, then advisories at bottom.

Question 17

What kind of rotor do we have?

Answer 17

A fully articulated.

Question 18

Sprag clutch on main drive shaft to _______________.

Answer 18

spin impact of main drive shaft

(Connect engine output shaft from engine RGB to xmsn AGB to provide drive via drive shaft to main and t/r, and then decouple to allow autorotation if engine fails)

Question 19

Upon moving the collective the whole thing will move and push the _________ then the ________.

Answer 19

Swash blade assembly up

Swashblade assembly moves all 4 rotor blades

Question 20

The tail rotor is attached to which Hyd system?

Answer 20

1 hyd system

Question 21

Why are there two hyd systems?

Answer 21

Redundancy purposes

Question 22

How is deficiency of lift counteracted in the tail rotor?

Answer 22

The delta hinge design

Question 23

ELT is either in ARM or ON?

Answer 23

Should always be in the ARM.
True, can reset the ELT by going ON to ARM

Question 24

When do we use pitot heat?

Answer 24

Visible moisture (SHALL be on)

Question 25

Purpose of the flight director is to _________ and ________.

Answer 25

Reduce pilot workload Assist in enroute navigation

Question 26

Where are EICAS messages displayed?

Answer 26

EICAS (engine instrument and crew alert system) warnings are on top

Question 27

If one AC inverter fails, ________.

Answer 27

the other one will pick up the load.

Question 28

If both the GEN fail and aux gen fail, then the ________.

Answer 28

Battery provides the power

Question 29

T/F: Electric power is both DC and AC

Answer 29

True

Question 30

Tail rotor drive shaft transits from ______ to _______ through ________ and into ______ at _______.

Answer 30

the engine reduction gearbox (RGB) TO the tail rotor THROUGH the drive shaft AND INTO the tail rotor gearbox (TGB) AT a 90 deg turn.

Question 31

Engine reduction gearbox (RGB) reduces _______ and provides __________.

Answer 31

The power turbine RPM Power to the transmission and rotor

Question 32

Combustion works/happens when ______.

Answer 32

fuel and air are mixed and ignited in the combustion chamber

Question 33

Starter turns the compressor, N1 aka the ________.

Answer 33

Gas generator turbine

Question 34

What does MAN fuel require the pilot to do?

Answer 34

Twist grip coordination to control fuel flow

Question 35

Fuel low are what numbers?

Answer 35

10 min (max continuous power) flight time Or 100 lbs in tank

Question 36

What component of design of the drive shaft output allows it to spin unhindered with engine failure or flameout?

Answer 36

Sprag clutch

Question 37

Rotor brake system powered by _______.

Answer 37

Its own dedicated reservoir and pump

Question 38

Move the Collective up, moves the _______.

Answer 38

moves the swash plate assembly and pitch rotor blades up

Question 39

If the #1 hyds fail, you will lose

Answer 39

the tail rotor servo (servo 1)

Question 40

What does depressing the force trim do?

Answer 40

Reduce magnetic clutch for pitch, roll, and yaw axis

Question 41

What does depressing the force trim do?

Answer 41

Reduce magnetic clutch for pitch, roll, and yaw axis