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Forum for Aeronautical Software old

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The Forum Aeronautical Software (FAS) has been established to provide a forum for those involved in the development of aeronautical software to share experiences and good practices and to provide a platform for the exchange of information regarding subjects addressed in the “software document suite”, new and emerging technologies, development methodologies, interesting use cases and other topics related to aeronautical software and related technologies.
The FAS is a joint RTCA/EUROCAE User Group that holds discussions and develops information papers called FAS Topic Papers (FTPs) relating to aeronautical software topics in efforts to harmonize these information papers. The purpose of this area of the RTCA/EUROCAE website is to provide an overview of the FAS and to provide access to selected information FTPs. Topics typically addressed by the FAS will relate to aeronautical software, including topics covered by the following set of RTCA/EUROCAE published documents (referred to as the “software document suite”):

DO-178C – Software Considerations in Airborne Systems and Equipment Certification
DO-278A – Software Integrity Assurance Considerations for Communication, Navigation, Surveillance and Air Traffic Management (CNS/ATM) Systems
DO-248C – Supporting Information fo DO-178C and DO-278A
DO-330 – Software Tool Qualification Considerations
DO-331 – Model Based Development & Verification Supplement to DO-178C and DO-278A
DO-332 – Object Oriented Technology and Related Techniques Supplement to DO-178C and DO-278A
DO-333 – Formal Methods Supplement to DO-178C and DO-278A

Any information paper (FTP) released by FAS has been coordinated among the members of the group and has been approved by the FAS co-chairs for release. These papers do not constitute official policy or position from RTCA/EUROCAE or any regulatory agency or authority. These documents are made available for educational and informational purposes


The goals of the FAS are as follows:

To share lessons learned in the use of the “software document suite” and to encourage good practices and promote the effective use of RTCA’s and EUROCAE’s publications.
To develop FAS Topic Papers related to subjects covered by “software document suite” or other related aeronautical software industry topics.
To identify and record any issues or errata showing the need for clarifications or the need for modifications to the “software document suite”.

If the FAS Executive Management Committee determines there is a general FAS agreement for proposed changes to the “software document suite” or the need for a new technology supplement, the FAS Executive Management Committee will bring this to the attention of RTCA/EUROCAE and FAA/EASA as appropriate with a request for discussion of the need for a new special committee/working group. It is expected that the efforts of the FAS would be used as input to the new special committee/working group thus the text development process would be more efficient as it would start with baseline material prepared by an expert user group.


Initial membership of FAS is limited to the Executive Management Committee and a Technical Leaders Group plus invited members who may be able to share their experience and expertise in the discussions related to and development of FTPs. The current membership is open to employees of companies that have membership to either RTCA or EUROCAE, with an associated role of either primary or observer.
Executive Management Committee – comprising the Executive Management Committee Leaders identified and agreed with RTCA and EUROCAE.
FAS Technical Leaders Group Members are those members identified by the Executive Management Committee to assist in leading Technical Groups (TGs) that will work on specific Information Papers as agreed by the FAS Executive Management Committee.
While membership is initially being managed through the Executive Management Committee, FAS is able to collect and store details of anyone wishing to Register Interest in the committee for future membership consideration.

Note that any contact and other information provided to the FAS shall be stored and maintained by the Executive Management Committee and will not be made available in the public domain. Click Registration of Interest to download the registration of interest form and upon completion, please submit it to

Publicly Available Papers

This area will contain links to papers that have been approved by the executive committee of FAS Executive Management Committee for release into the public domain. These papers do not constitute official policy or position from RTCA/EUROCAE or any regulatory agency or authority.


Tool Operational Requirements Validation
Clarification of developer-TOR
Inconsistency between Tool Qualification Assurance objectives and Tool Planning process objectives for TQL-5
Qualification of Tools Used to Develop or Verify a Software Tool
DO-330/ED-215 Developer – TQP Clarification
DO-330/ED-215 Section 11.5 Dissimilar Tools


FTP1002 DO-331/ED-218 Annex Tables MB.A-3/MB.C-3 and MB.A-4/MB.C-4 Item Clarification

Questions for the FAS

If you have a question about any of the DO-178C documents suite or on the documents published by FAS, please submit it to:


Co-Chair: Patty Bath (
Co-Chair: Herve Delseny (

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