UH-60 Systems Test Review

Question 1

Two types of power supplied by the APU. What do they power?

Answer 1

Pnuematic
-Main engine start up
-Cabin hearter
Electric AC
-Gorund Operations
-Emergency in flight power

Question 2

Where does the APU get its fuel from?

Answer 2

1 fuel cell

Question 3

What is different about the APU fuel lines from main fuel lines?

Answer 3

Not self sealing

Question 4

What does the APU Accumulator do?

Answer 4

Store hydraulic and nitrogen pressure to start the APU

Question 5

What PSI shoul the APU Accumulator be at before starting?

Answer 5

2800 PSI

Question 6

Which fuel cells supply which engine?

Answer 6

They correspond (#1 Fuel cell, #1 engine) unless cross matched by the Fuel selector levers

Question 7

How many stages do the main landing gear struts have? How many Gs are the main struts rated for?

Answer 7

2, upper an lower or 1st and second.

11.5 Gs

Question 8

What is the lower or first stage strut rated for?

Answer 8

0-10 Feet per second

Question 9

What is the upper or second stage strut rated for?

Answer 9

10 to 39 feet per second

Question 10

What is the capacity of each fuel cell?

Answer 10

180 Gallons

Question 11

What are the numbers associated with pressure refueling?

Answer 11

179.5 Gallons per cell
55 PSI
300 GPM

Question 12

What is the capacity ssociated with gravity refueling?

Answer 12

180 Gallons

Question 13

What are the numbers associated with closed circuit refueling?

Answer 13

178 Gallons
15 PSI
110 GPM

Question 14

How many components are there in the main Transmission and what are they?

Answer 14

5

• Main Module
• # 1/#2 Input Module
• # 1/#2 Accessory Module

Question 15

How many tail rotor TXSM systems are there? What are they?

Answer 15

2

• Tail rotor gearbox
• Intermidiate gearbox

Question 16

What stops the main rotors from flapping up?

Answer 16

Anti flaps

Question 17

What stops the main rotors from drooping down?

Answer 17

Droop stops

Question 18

What stops the main rotors from lagging?

Answer 18

Dampeners

Question 19

What stops the main rotors from leading?

Answer 19

Lead stops

Question 20

What absorbs the vibration from the main rotor blades?

Answer 20

Bifilars

Question 21

How many tie down rings does a blackhawk have?What are they rated for?

Answer 21

17, 5000 lbs

Question 22

Cabin floor weight rating

Answer 22

300 pounds per square

Question 23

How many cargo rings are attached to each door? WHat are they rated for?

Answer 23

4, 3500 lbs

Question 24

What are ceiling tie downs rated for?

Answer 24

4000 lbs

Question 25

How many hydraulic pumps are there? What are they?

Answer 25

3,
#1, #2
Back up

Question 26

What powers each hydraulic pump?

Answer 26

Back up has its own AC generator
#1/#2 TXSM Accessory Modules

Question 27

What is the flow from hydraulic pump 1?

Answer 27

1 Hydraulic pump -> #1 Transfer module -> First stage Primary/ Tail rotor servos

Question 28

What is the flow from hydraulic pump 2?

Answer 28

2Hydraulic pump -> #2 Transfer module -> Second stage Primary servos -> Pilot assist module -> boost SAS Servos

Question 29

What is the flow from the back up hydraulic pump?

Answer 29

Back up pump -> Utility Module -> Accumulator -> Second stage tail rotor servos -> #1/#2 Systems

Question 30

What are the main parts of the engines? What do they do?

Answer 30

Accessory Section: Houses many components
Cold Section: Copress the air (17:1)
Hot Section: Generate the fireball
Power Turbine Section: Spin the drive shaft

Question 31

What components are on the accessory area of the enigne?

Answer 31

• Chip sensors
• Oil filter
• Fuel Filter
• Liquid to liquid exchanger
• ODV
• HMU
• Inlet Particle separator

Question 32

Emergecy Engine Shutdown Procedure

Answer 32

• PCL to off (lift and oull back first)
• Fuel Selector to off
• Fuel boost pump off

Question 33

PCL and positions

Answer 33

Power Control Lever

Off/Idle/Fly/Lockout

Question 34

FSL and positions

Answer 34

Fuel Selector Lever

Off/Direct/Cross Feed