AIRCRAFT SAFETY MODEL DEVELOPMENT AND INTEGRATION IN A RISK OBSERVATORY

Pierre Bieber (1) , Sylvain Metge (2) , Marion Morel (3) , Julien Ple

1 ONERA - The French Aerospace Lab [Toulouse]
2 Airbus Operation S.A.S.
3 TAES - THALES Avionics Electrical Systems

The Future Sky Safety project 4 (FSS P4) aims at developing a prototype Risk Observatory (RO) that will assist in the safety assessment of the total aviation transport system. The Risk Observatory is based on the interaction between safety models covering various domains of the aviation transport system: Aircraft, Air Traffic Management, Airline Operation. In this paper we describe the development of the Aircraft domain safety model and its integration within the RO thanks to the specification and the implementation of a dedicated interface between the Aircraft Operation Safety Model described in this paper and a backbone model developed in cooperation with the other partners of the FSS project. The main inputs used to develop the aircraft safety model are the Aircraft Functional Hazard Assessment (FHA) and the Standard Operating Procedures (SOP). The FHA is used to assess the impact of the aircraft function failures on the aircraft and its occupants considering existing or assumed mitigation means and derive safety requirements for the aircraft design. In the context of FSS, the FHA is used to infer a severity level for each considered failure scenario and the ensued occurrence probability targets as per the European Aviation Safety Agency regulations. The SOP describes the main actions to be performed by the flight crew during each flight phase in order to ensure a safe flight and landing. The Aircraft safety model computes, for each operation procedure, a qualitative safety performance measure that is based on crew errors, aircraft system failures, safety performance measure of previous relevant procedures and external actor errors. Integration of the Aircraft Safety Model in the RO is performed via a Backbone model that has been developed with other domains. The Backbone model manages in a consistent way generic contributors and influencing factors like the environmental conditions, leading to a global risk such as Runway Excursion. The Aircraft Safety Model is used to verify that the preliminary aircraft system architecture is able to fulfil the safety objectives resulting from the FHA. The Aircraft Safety Model contributes to refine the aircraft system architectures and flight crew contributors operations. It provides safety outcomes to the Backbone model.

Mots clés: Safety; Aircraft Safety Modelling; Flight operation procedures; Runway excursion; Mid-Air collision

Domaines: Performance et fiabilité [cs.PF]

Pierre Bieber, Sylvain Metge, Marion Morel, Julien Ple. AIRCRAFT SAFETY MODEL DEVELOPMENT AND INTEGRATION IN A RISK OBSERVATORY. EASN International Conference on Innovation in European Aeronautics Research, Sep 2017, Varsovie, Poland. ⟨hal-02078264⟩