Project brief
Comprehensive System Safety Assessment package for a regional turboprop aircraft avionics suite comprising 14 LRUs, prepared per SAE ARP4761 "Guidelines for the Conduct of the Safety Assessment Process on Civil Airborne Systems and Equipment" and SAE ARP4754A "Guidelines for Development of Civil Aircraft and Systems." The document set includes Functional Hazard Assessment, Preliminary System Safety Assessment, System Safety Assessment, and Common Cause Analysis.
The report scope brings several safety-analysis methods into a structured documentation package. This portfolio explanation is not an independent safety determination.
The engineering challenge
Maintain a traceable relationship between aircraft functions, failure conditions, architecture, and supporting safety analyses.
Engineering approach
- Organize functional hazards and preliminary architecture assessments.
- Link failure-mode, fault-tree, and common-cause analyses to system functions.
- Assemble assumptions, verification references, and conclusions into a reviewable package.
Features & capabilities
- Functional Hazard Assessment (FHA): 87 functions assessed across 6 ATA chapters
- Preliminary System Safety Assessment (PSSA): failure mode propagation analysis
- System Safety Assessment (SSA): probability calculations, design verification
- Fault Tree Analysis (FTA): 23 top-level undesired events with CORDs
- Failure Modes and Effects Analysis (FMEA): 340 failure modes documented
- Zonal Safety Analysis (ZSA) and Particular Risk Analysis (PRA)
- Development Assurance Level (DAL) allocation per ARP4754A
- Safety objectives: probability verification against DO-1309 FAR 23.1309 requirements
Software & engineering tools
SAE ARP4761, SAE ARP4754A, MATLAB FT+ for FTA, Microsoft Visio, ITEM Toolkit FMEA, Boeing SSA Methodology