Basic Aircraft Hydraulic Power System And Introduction To Hydraulic Troubleshooting

Question 0

Five basic components for any hydraulic system

Answer 0

keyword sharp. Selector valve, hydraulic lines, actuating unit, reservoir, pump

Question 1

What is the purpose of a hydraulic power system

Answer 1

The purpose of a hydraulic power system is to supply a controlled filtered flow of fluid under pressure to the hydraulic systems in the aircraft

Question 2

What are two types of power systems

Answer 2

The primary flight control hydraulic system and the utility hydraulic system

Question 3

What does the primary flight control system supply

Answer 3

The primary flight control system supplies fluid to the primary flight controls only

Question 4

What does the utility system supply fluid to

Answer 4

To all subsystems including the primary flight controls

Question 5

All Navy aircraft hydraulic systems are serviced with what

Answer 5

With a clean filtered MIL – PRF – 83282 hydraulic fluid

Question 6

What are the authorized servicing equipment for hydraulic fluid

Answer 6

The hydraulic fluid servicing unit and the hydraulic test stand

Question 7

The flight control power system supplies pressure flow to the way

Answer 7

The elevator, the ailerons, and the rudder

Question 8

The utility power system supplies pressure flow to the what

Answer 8

Back up for flight controls. Arresting gear. Wing flaps. Wing fold. Landing gear. Speed brakes

Question 9

What are the essential components of the flight control hydraulic system

Answer 9

The reservoir, the reservoir relief valve, the pump, the filters, the pressure indicating circuit, the check valves, the power system relief valve, the accumulator

Question 10

What does the reservoir do

Answer 10

Maintains a supply of fluid for the hydraulic system

Question 11

What does the reservoir relief valve do

Answer 11

It protects the reservoir from damage due to excessive pressure

Question 12

What does the pump do

Answer 12

It creates a flow fluid

Question 13

What do filters do

Answer 13

Filter particulate contaminants from the system hydraulic fluid

Question 14

What does the pressure indicating circuit do

Answer 14

Monitor system pressure during operation

Question 15

What do check valves do

Answer 15

Prevent backflow in the system from acting against the pump and aid in servicing the reservoir

Question 16

What does the power system relief valve do

Answer 16

Protects the system from damage caused by excessive pressure

Question 17

What does the accumulator do

Answer 17

Stores hydraulic fluid under pressure for normal and emergency use

Question 18

Explain the operations of the hydraulic system

Answer 18

The reservoir supplies fluid through the suction or supply line to the pump. The pump delivers a flow of fluid under pressure through the filter to the subsystems of upon demand. Returning fluid passes through the check valve and filter before entering the reservoir. The flight and utility system relief valves protect the system by relieving excessive pressure; pressure fluctuations in the systems are monitored via the pressure gauges in the cockpit.

Question 19

Never pressurize a system until when

Answer 19

Until a thorough visual inspection has been performed and all control switches and handles are in the proper position

Question 20

Never attempt to disconnect until when

Answer 20

Until you are sure which unit or system the line is connected to and all pressure has been bled from the system

Question 21

Always ensure there are no objects in the path of movable surfaces and

Answer 21

Be sure to always have safetymen posted

Question 22

Check the ______ for any safety notes cautions or warnings and ensure the hydraulic system is properly serviced prior to operating

Answer 22

Maintenance instruction manual or Mims

Question 23

Troubleshooters are responsible for quickly identifying any deviation from normal system operation in order to bring the system once more to a safe normal operational status through the use of a standard _______

Answer 23

Logical approach

Question 24

Basic qualification of a troubleshooter

Answer 24

To thoroughly understand normal operation of the system and hydraulic Theory

Question 25

What is a malfunction

Answer 25

Any noticeable change from normal system operation

Question 26

When should a troubleshooter assume

Answer 26

Never ever ever ever

Question 27

What is a symptom

Answer 27

Any factor that will contribute to the solution of the malfunction

Question 28

The PC Sim is used for

Answer 28

To simulate actual aircraft systems and will give trainees actual troubleshooting experience under a controlled safe application

Question 29

What are the general themes for the logical approach to hydraulics troubleshooting

Answer 29

Visual inspection, operational check, classification of trouble, diagnosis, verification, remove and replace, final operational check

Question 30

Explain the logical approach step of visual inspection

Answer 30

Inspect for mechanical malfunction. Inspect for security proper installation leaks etc. Inspect hydraulic system for foreign object damage or debris. Correct before continuing.

Question 31

Explain the operational check step

Answer 31

Used to determine if a malfunction exist not discovered during the visual inspection. Energize the electrical system, pressurized hydraulic system, and operate the affected system at least one full cycle. Observe unit movement for proper sequence operating speed and system pressure for normal fluctuation before during and after movement

Question 32

Explain the third step of the logical approach to hydraulic troubleshooting

Answer 32

The troubleshooter determines what type of malfunction exists

Question 33

Malfunctions usually fall into work four basic categories

Answer 33

Hydraulic mechanical electrical automatic

Question 34

What are the symptoms of hydraulic malfunctions

Answer 34

Internal leaks, external leaks, partial restriction, total restrictions, or air in the system

Question 35

Internal leaks are identified by

Answer 35

Low system pressures or slow unit movement

Question 36

How do you repair internal leaks

Answer 36

Components must be removed and replaced