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TH-73 > Systems (GROUND SCHOOL) > Flashcards

Systems (GROUND SCHOOL) Flashcards

1
Q

What kind of engine does the th-73 have?

A

PT6B-37A turboshaft

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2
Q

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

A

90 deg angle

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3
Q

What is the purpose of the reduction gear box?

A

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

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4
Q

The Combustion Chamber _______________.

A

Mixes fuel and air and ignites it.

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5
Q

At what percentage of N1 does the starter drop out?

A

43% N1

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6
Q

Starter: What starts spinning fast?

A

Gas generator turbine

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7
Q

What does manual mode require the pilot to do?

A

Coordinate twist grip

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8
Q

What mode do we always fly in?

A

EEC (electronic engine control)

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9
Q

What ITT for hot start?

A

870°C

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10
Q

What is the configuration for the fuel cells?

A

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

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11
Q

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

A

False (there still is the engine driven fuel pump)

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12
Q

What is the main concern with loss of transfer pump?

A

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

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13
Q

How many minutes of flight with FUEL LO caution?

A

10 minutes (at max continuous power)

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14
Q

How many pounds of fuel with FUEL LO caution?

A

100 lbs.

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15
Q

Rotor brake system powered by ___________.

A

A dedicated reserve pump - independent hyd sys

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16
Q

CAS messages are displayed how?

A

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

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17
Q

What kind of rotor do we have?

A

A fully articulated.

18
Q

Sprag clutch on main drive shaft to _______________.

A

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)

19
Q

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

A

Swash blade assembly up

Swashblade assembly moves all 4 rotor blades

20
Q

The tail rotor is attached to which Hyd system?

A

1 hyd system

21
Q

Why are there two hyd systems?

A

Redundancy purposes

22
Q

How is deficiency of lift counteracted in the tail rotor?

A

The delta hinge design

23
Q

ELT is either in ARM or ON?

A

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

24
Q

When do we use pitot heat?

A

Visible moisture (SHALL be on)

25
Q

Purpose of the flight director is to _________ and ________.

A

Reduce pilot workload
Assist in enroute navigation

26
Q

Where are EICAS messages displayed?

A

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

27
Q

If one AC inverter fails, ________.

A

the other one will pick up the load.

28
Q

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

A

Battery provides the power

29
Q

T/F: Electric power is both DC and AC

A

True

30
Q

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

A

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.

31
Q

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

A

The power turbine RPM
Power to the transmission and rotor

32
Q

Combustion works/happens when ______.

A

fuel and air are mixed and ignited in the combustion chamber

33
Q

Starter turns the compressor, N1 aka the ________.

A

Gas generator turbine

34
Q

What does MAN fuel require the pilot to do?

A

Twist grip coordination to control fuel flow

35
Q

Fuel low are what numbers?

A

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

36
Q

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

A

Sprag clutch

37
Q

Rotor brake system powered by _______.

A

Its own dedicated reservoir and pump

38
Q

Move the Collective up, moves the _______.

A

moves the swash plate assembly and pitch rotor blades up

39
Q

If the #1 hyds fail, you will lose

A

the tail rotor servo (servo 1)

40
Q

What does depressing the force trim do?

A

Reduce magnetic clutch for pitch, roll, and yaw axis

41
Q

What does depressing the force trim do?

A

Reduce magnetic clutch for pitch, roll, and yaw axis

TH-73 (1 decks)

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