21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-6.7.3

SAFETY ASSESSMENT OF AIRCRAFT MOUNTED SYSTEMS

Trotta L., Buffardi R., Querzoli R.
Alenia Aeronautica, Italy

Keywords: safety assessment, aircraft mounted systems

This contribution will highlight the methodology to assess the Safety aspects of Military Aircraft Systems. being part of a Fly-By-Wire Ale. The correlations between FMECA and Safety Assessment will be shown to identify all possible hazards caused by single failures. A tool using Fault Tree Analysis approach, to assess from a quantitative and qualitative point of view the discovered hazards, will identify the minimal cut sets and critical items in the System configuration. Through the Zonal Hazard Analysis it will be shown how to identify the hazards due to the physical location of the system components and the possible effects due to component failures, disadvantageous operating conditions, maintenance errors and environment induced faults. Software Safety Assessment is performed to analyse and assess the safety of the software configuration items of a System and ensures that a risk classification is allocated appropriate to the severity of hazard which could be caused by a software error. These results will lead to define the critical areas and the possible corrective actions to give a compliance statement to System Qualification and Airworthiness requirements.

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