Sofema Aviation Services (SAS) www.sassofia.com considers the terminology and descriptors used in support of CS25-1309 analysis in the EASA Failure Condition Classifications and Probability Terms Introduction – Classifications Failure conditions may be classified according to the severity of their effects as follows: No safety effect: Failure conditions that would have no effect on safety. o For…

Sofema Aviation Services (SAS) considers System Safety Assessment in relation to the Arsenal Draft of AC 1309–1. Introduction – System Safety Assessment In 2002, the FAA provided a Notice of Proposed Rulemaking (NPRM) relevant to 14 CFR Part 25. Accompanying this notice is the Arsenal Draft of AC 1309–1. Existing definitions and rules in 25.1309…

CS 25 Introduction to Airworthiness – Safety Assessment – Consideration by Sofema Aviation Services (SAS) www.sassofia.com Introduction Related to Failure Condition Classification For large airplanes, the airworthiness standards (CS/FAR-25), require fail-safe structures, except when it is not possible to implement such a design due to geometrical restrictions. An example of such a case is the…