5.13

Question 1

What document provides guidance to developers and certification authorities to determine if software preforms reliably?

Answer 1

DO-178/ED-12B

Question 2

What event is Level A?

Answer 2

Catastrophic

Question 3

What event is Level B?

Answer 3

Hazardous/Severe

Question 4

What event is Level C?

Answer 4

Major

Question 5

What event is Level D?

Answer 5

Minor

Question 6

What event is Level E?

Answer 6

No effect

Question 7

What are the three different types of software that can be contained in LRU’s?

Answer 7

Core software
Operational software/Application software
Database

Question 8

Define operational software:

Answer 8

the kind of display in the cockpit

Question 9

When implementing a new database software what does it change?

Answer 9

It only changes parameter values rather than the program

Question 10

Who may modify Level A software?

Answer 10

Authorised personnel only

Question 11

Level E software can be handle by…..

Answer 11

Maintenance Personnel

Question 12

Core software must never be touched, true or false?

Answer 12

True

Question 13

When is the only circumstance that core software can be modified?

Answer 13

When there is an agreement with the Aircraft and LRU manufacturers

Question 14

A change of operational software can be done if

Answer 14

there is an agreement between aircraft and LRU manufacturers, however the LRU manufacturer can be bypassed if the airline engineering guarantees an equivalent level of safety

Question 15

Does a Level E software change require manufacturer involvement?

Answer 15

No

Question 16

Core software is apart of the aircraft loop. True or false?

Answer 16

True

Question 17

How are dirty components shielded?

Answer 17

They are shielded with a heat sink