I am trying to figure out the following:
a) An IFE system that has software for the compute and for the seatback, what DAL level is the software classified at?
b) If it is at DAL 5, does it still have to go through formal approval each time an upgrade to the software is posted? Or, just the first time?
c) Where can I find safety requirements (DO-178C) that explicitly detail the areas for IFE sub-systems?
d) Are there any checklist documents that specify the questions that need to be answered for IFE sub-systems for compliance?
Your insights are appreciated. Thank you.