5.1-5.6

Question 1

What is an EIDS

Answer 1

Electrical instrument display system

Question 2

What is an EFIS

Answer 2

Electronic Flight instrument system

Question 3

What are the advantages of EIDS and EFIS

Answer 3

• Variety
• Coloured Displays
• important data (accentuated) unimportant data (suppresses)
• fewer components
• all EFIS monitors are the same
• interchangeable

Question 4

How do all modern aircraft use digital technology?

Answer 4

• calculations in the system are made by CPU’s
• electronic units are connected by Digital buses
• pilot selected push button commands are processor controlled

Question 5

What required data is transmitted digitally by the ARINC 429 bus?

Answer 5

Via display data buses to the cpu controller crt or lcd
Via digital buses to a printer
In digital form to a radio transmitter

Question 6

What is a CPU

Answer 6

Microprocessor. Central processing unit.

It performs all the mathematical and logical functions of manipulating data in memory.

Question 7

What is An I/o

Answer 7

Input / output device.

They provide the interface between the microprocessor and the outside world.

Question 8

What are the 3 types of busses and what do they do

Answer 8

Data bus: carry data associated with memory or input/output transfer.
Address bus: specify the memory location or input/output port.
Control bus: various control lines generated by the CPU

Question 9

What is hardware?

Answer 9

All parts and devices used to process digital data

Question 10

What is software

Answer 10

All programmes and instructions for the CPU

Question 11

What is the purpose for the memory section?

Answer 11

To programme steps and data that just be stored and recalled at the appropriate time in order for a computer to Perform it’s fiction

Question 12

What is RAM

Answer 12

Volatile memory.
Any unsaved data is loft at power off.

Ram is used to store data which changes during the operation of the computer. E.g. calculations.

Question 13

What is ROM

Answer 13

Non volatile memory.
No data is lost at power off.

It is used to store programme steps and constant values.
Contents of ROM cannot be changed after manufacturing.

Question 14

What are the other types of ROM

Answer 14

PROM.
• EPROM (Erasable programmable read only memory)
•EAROM (electrically alterable read only memory)

Question 15

What is EPROM

Answer 15

Altered by erasing the existing programme through the integrated circuit pack. Done by exposing Uv light through a window in the cover.
The elements are then programmed with an appropriate series of logic 1’s and 0’s

Question 16

What is EAROM

Answer 16

It has the advantage over EPROM that each individual element of the memory can be changed without erasing all data

Question 17

What are the 5 types of computer?

Answer 17

Control 
Reference
Interactive
Storage
Information

Question 18

What’s a reference computer?

Answer 18

A computer that may be used as a source of information or data is referred.

Question 19

An example of a reference computer?

Answer 19

Inertial reference system (IRS)

Is a laser gyro and an accelerometer.

Question 20

What are information computers

Answer 20

Computers that collect data form various places, process it and formats it for display. Main task is to collect and display data.

Question 21

What’s an example of an information computer

Answer 21

EICAS

Engine indication and crew alerting system

Question 22

What is a storage computer

Answer 22

Retains information provided to them by other systems and computers

Question 23

What is an example of a storage computer

Answer 23

EECM (electronic engine control monitor)

Stores all the fault data from the EEC

Question 24

What happens when an EEC system indicates a failures

Answer 24

The maintenance personnel can recall the faults from the EECM to determine what maintenance action needs to be competed

Question 25

What’s a controlling computer?

Answer 25

A computer with the primary task of controlling something. One of the largest categories of computers.

Question 26

What’s an example of a controlling computer?

Answer 26

Flap / Slat Electronic Unit (FSEU)

Which monitors the flap lever position and controlling the flap position on the wings

Question 27

How does an FSEU control flaps

Answer 27

Utilising information from other systems

Question 28

What’s an interactive computer?

Answer 28

Display information to the operator and then manipulate data based on the interaction between the operator and the computer.

Question 29

An example of an interactive computer?

Answer 29

FMC (flight management computer) it calculated optimum cost profiles