No Hazard approach for the certification of commercial parts on EASA aircraft.

The purpose of this thesis is to analyze the approach of the certification of commercial parts for EASA aircraft, the Airbus A320neo aeroplane and the Eurocopter AS350 Ecureuil (Airbus H125) rotorcraft, which results no safety criticals. The analysis throws its roots in the study of the ICAO aeronautical regulation hierarchical structure and, in particular, the Certification Specifications CS25 and CS27, respectively related to large aeroplanes and to small rotorcrafts. The focus has turned on the parts concerning to on-board systems and equipment, in order to derive the requirements necessary for the certification. In parallel, the applicable standards ARP-4754A and ARP-4761 have been analyzed as a guideline for the development of this work, in order to give emphasis on safety aspects and demonstrate compliance with the airworthiness regulations. However, the applicable standards DO-178B, DO-254, DO-160 and MIL-STD-810G are also considered in support of the demonstration the compliance of the products in exam with the regulations. Firstly, the commercial parts are introduced and divided in two groups: on one side the UPS and a pair of batteries are analyzed, on the other side, the electronical items, Apple iPad Air 4 and Panasonic Thoughtbook 55 are considered as EFBs (Electronic Flight Bag), which must have minimal or negligible impact on safety (Design Assurance Level C and D). Secondly, an overview of the two aircraft features, A320neo and AS 350, is presented. The derived requirements from the Certification Specifications, respectively CS-25 and CS-27, are compared with the parts features in order to demonstrate their compliance to the airworthiness regulations and the EFB requirements list is matched with the electronical items features. The results of the analysis is to verify the compliance with the requirements and to assess subsequently the possible mitigations actions to be implemented on board, in order to support an increasing employ of commercial parts already developed and known for specialized use, reducing design and testing costs and exploiting already existing resources. In conclusion, the example of the applicability and the use of commercial parts in the space context is mentioned, referring to Ingenuity, which mounts a commercial and inexpensive Qualcomm® Snapdragon™ 801 processor.