28 Questions
What is the potential consequence of an aircraft system failing due to a software error, with a significant reduction in safety margins?
Injuries to some occupants
An aircraft system allocated a software level of C, if it fails due to a software error, may cause:
Injuries to some occupants
What is the criticality category of an aircraft system that, should it fail due to a software error, would cause no injuries to occupants?
minor effect
What is the corresponding software level for an aircraft system allocated a Criticality Category of Hazardous?
B
If an aircraft system fails due to a software error and may cause injuries to some of the occupants, the system has a software criticality category of?
major effect
What is the potential consequence of an aircraft system failing due to a software error, with a slight increase in crew workload?
A slight increase in crew workload
An aircraft system allocated a software level of D, if it fails due to a software error, may cause:
A slight increase in crew workload
Which document outlines the requirements for software control?
AWN 43
Who is responsible for producing the operational program of the FMS?
The manufacturer
What is the primary concern for an aircraft system allocated a software level of C?
Injuries to some occupants
Which software level is associated with a slight increase in crew workload?
D
Software documentation procedures are laid down in which document?
AWN (45)
Who is responsible for controlling software?
The National Aviation Authority
What is the primary concern for an aircraft system allocated a Criticality Category of Hazardous?
Injuries to some occupants
What is the definition of level one software?
Critical
Who can sign for a software update?
Engineer
An aircraft system with a software level of D, should it fail due to a software error, may cause the aircraft safety margin to be?
slightly decreased
Software modification is carried out following the same rules as modifications to?
Hardware
What is the effect of a level 1 software failure?
Loss of aircraft and/or fatalities
Who is responsible for software changes?
The aircraft constructor
Who can design new software?
BCAR section A8 approved company
What is the 'Verification' phase of software development?
Performance testing a programmed EPROM
Who is responsible for software assessment according to AWN 43?
The aircraft constructors
What is the definition of a level 1 software failure?
A failure that is critical and can lead to loss of aircraft
Where can you find the requirements for configuration management of software?
AWN 43
Where would you find the rules regarding upgrade of software?
AWN 43
What is the primary goal of software verification?
To ensure the software meets the requirements
What is the significance of RTCA/EUROCAE document Do-178/ED-12?
It provides guidelines for software development
Study Notes
Software Management Control
- An aircraft system that fails due to a software error, causing a significant reduction in safety margins, may also cause injuries to some occupants.
- A system allocated a software level of C, if it fails due to a software error, may cause injuries to some occupants.
- A system allocated a Criticality Category of Hazardous has a Software Level of B.
- A system that fails due to a software error, causing a slight increase in crew workload, has a software level of D.
- A system with a software level of D, if it fails due to a software error, may cause the aircraft safety margin to be slightly decreased.
Software Criticality Categories
- A system that fails due to a software error, causing injuries to some occupants, has a software criticality category of major effect.
- A system that fails due to a software error, causing no injuries to occupants, has a criticality category of minor effect.
Software Control Requirements
- Requirements for software control can be found in AWN 43.
- Software changes come under the responsibility of the aircraft constructor.
Software Design and Modification
- Software can be modified using the same rules as apply to modifications to hardware.
- A BCAR section A8 approved company can design new software.
- The aircraft manufacturer is responsible for producing the operational program of the FMS.
Software Documentation
- Software documentation procedures are laid down in AWN 45.
- Requirements for configuration management of software can be found in AWN 43.
Software Failure Effects
- A level 1 software failure can lead to loss of aircraft and/or fatalities.
- A level 1 software failure is defined as critical and can lead to loss of aircraft.
Software Responsibility
- The National Aviation Authority is responsible for controlling software.
- The aircraft constructor is responsible for software assessment.
- A design organization or the aircraft manufacturer can sign for a software update.
This quiz assesses your understanding of aircraft system safety and software management, focusing on the potential consequences of software errors on safety margins.
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