Safety Assessment of Aircraft Systems

Safety is the state in which risk is acceptable (ARP4761).
To assess the safety of a system, on the one hand, the safety effect associated to a failed behavior of the system needs to be evaluated, on the other hand, the method to conduct the safety assessment needs to be determined. For large aeroplanes for example, the upper limit for the average probability per flight hour for a failed behavior of a system (failure condition) resulting in catastrophic safety effect shall be less than 1 × 10-9. To assess an aircraft’s system regarding this safety requirement:

(1) all possible failed behaviors of all system’s components shall be individually assessed resulting in a definition of basic events,
(2) how these basic events contribute to a failed behavior of the system shall be assessed based on the system’s architecture, and
(3) a method to conduct the assessment e.g., fault tree, shall be determined.

If that what you are interested in or where you need a consultation, just contact us!