What is DO-254? Design Assurance Guidance for Airborne Electronic Hardware

What is DO-254? DO-254, “Design Assurance Guidance for Airborne Electronic Hardware,” was realeased in 2000 and formally recognized by the FAA in 2005 via AC-152 as a means of compliance. It provides guidance for the design of Complex Electronic Hardware (CEH) in airborne systems and equipment for use in aircraft or engines. DO-178 is the established software counterpart of DO-254. Functions are classified as either software or hardware, and governed by the processes provided by the guidance of either DO-178 or DO-254 accordingly. DO-254 Processes & Outputs The basic hardware design life-cycle processes are: The planning process. The hardware design Continue Reading > > >

Reverse Engineering in DO-254

In either Top Down or Reverse Engineering, the design traceability and elemental analysis (from DO-254 Appendix B) ultimately provide the evidence of completion for this task. Requirements Decomposition Prerequisites System Level Functional Requirements complete and baselined System Design Constraints Requirements Decomposition Objectives Complete decomposition of System Level Requirements into Hardware Requirements. Decomposition implies that the newly developed requirements are traceable to the System Level; the requirements traceability will be the verification that this task is complete. Capture of design specific Derived Requirements as needed to fully define the functions and performance. Derived Requirements are defined as requirements that will not Continue Reading > > >

How do you become a Designated Engineering Representative or DER?

A DER is an individual, appointed in accordance with 14 CFR  183.29, who holds an engineering degree or equivalent, possesses technical knowledge and experience, and meets the qualification requirements of Order 8100.8D. A DER may be appointed to act as a Company DER and/or Consultant DER. Company DERs can act as DER for their employer and may only approve, or recommend approval, of technical data to the FAA for the company. Consultant DERs are individuals appointed to act as an independent (self-employed) DER to approve or recommend approval of technical data to the FAA. The followings are the General (but Continue Reading > > >