Zonal Safety Analysis

Explicitly, by adding as a specific failure mode (e.g. maintenance error) into the FT. The CCF typically originate from the Common Mode Analysis (CMA) (see Chapter 6), the Particular Risk Analysis (PRA) (see Chapter 7) or the Zonal Safety Analysis (ZS A) (see Chapter 8). 

Zonal Safety Analysis (ZS A), which is discussed in Chapter 8. 

It is therefore necessary to recognise that such independence may not exist in the practical sense, and specific studies are necessary to ensure that independence in physical location can either be assured or, if not possible, deemed acceptable by incorporation into the probability declaration. The FAA (FAR25.1309), HAS A (CS25.1309), and S AE ARP4761 refer to this study as a Zonal Safety Analysis (ZSA). 

The aim of this chapter is to explore the use of the Zonal Safety Analysis (ZSA) as one of the tools in the System Safety process. The ZSA considers the proximity aspects of individual system/item installations and the potential for mutual influence between... 

Table 8.3 Zonal safety analysis inspection sheet... 

Chiesa, S., Corpino, S., Fioriti, M., Rougier, M., Viola, N., 2012. Zonal Safety Analysis in Aircraft Conceptual Design Application to Save Aircraft. Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Italy, http //pig.sagepub.eom/content/227/4/714. 

The common cause analyses are performed. R R A N N Particular Risk Assessment (PRA) Common Mode Analysis (CMA) Zonal Safety Analysis (ZS A) 5.1.4 ... 

This step involves the Safety Engineer highlighting to the Test Pilot and/or the HF Specialist all failure conditions identified via techniques such as the Functional Hazard Analysis (FHA) (Chapter 3), Failure Modes and Effects Analysis (EMEA) (Chapter 5), Common Mode Analysis (CMA) (Chapter 6), Particular Risk Analysis (PRA) (Chapter 7) and Zonal Safety Analysis (ZSA) (Chapter 8). 

Common Cause Analysis Generic term encompassing zonal safety analysis, particular risk analysis and common mode analysis [RTCA/1X)-178B/ED-12B]. 

A particular risk assessment examines those common events or influences that are outside the system(s) concerned but which may violate independence requirements. These particular risks may also influence several zones at the same time, whereas zonal safety analysis (ZSA) is restricted to each specific zone. Some of these risks may also be the subject of specific airworthiness requirements. Some of particular risks result from airworthiness regulations, while others arise from known external threats to the aircraft or systems. Typical particular risks include, but are not limited to the following ... 

Zonal safety analysis (ZSA)/Zonal hazard analysis (ZHA)... 

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