5-13 - Software Management

Question 1

What are the established design assurance levels according to DO-178B

Answer 1

Levels A to E

Question 2

What design assurance level are flight control and navigation systems?

Answer 2

A

Question 3

What design assurance level are IFE systems?

Answer 3

E

Question 4

Modern LRUs contain there software in different packages called?

Answer 4

1. Core software
2. Operational software/Application software
3. Database

Question 5

What function does the Core software perform?

Answer 5

It defines the individual system. It interfaces one LRU with another

Question 6

Who can modify level A software?

Answer 6

Only authorised personnel

Question 7

Who can modify level E software?

Answer 7

Any maintenance personnel

Question 8

Why must the core software never be touched?

Answer 8

It is past of the control loop of the aircraft. This software can only be modified with the agreement of the LRU manufacturer

Question 9

When can operational/application software be changed by bypassing the LRU manufacturer

Answer 9

If the airline engineering guarantees an equivalent level of safety

Question 10

What level of software can be changed without a manufacturers involvement

Answer 10

If it is guaranteed that the software is level E

Question 11

What are th categories of software

Answer 11

1. Field loadable Software (FLS)
2. Aeronautical databases
3. Factory loaded software

Question 12

What is the aircraft configuration list (ACL)

Answer 12

A list of LRUs and modules with loadable software airplane parts (LSAP) that are applicable to a specific aircraft

Question 13

What is Field Loadable Software (FLS)

Answer 13

Software, including data tables that can be loaded without removing the system from its installation

Question 14

What is Loadable software aircraft part (LSAP)

Answer 14

Field loadable software that is considered to be part of the aircraft approved design