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Modelling distributed crewing in commercial aircraft with STAMP for a rapid decompression hazard
Kirsten M A Revell1, Craig Allison1, Rodney Sears2
1a Human Factors Engineering, Engineering Centre of Excellence , Boldrewood Campus, University of Southampton , Southampton , UK.
Ergonomics
|September 7, 2018
Summary
Distributed crewing in commercial aviation can enhance safety and reduce costs. System-Theoretic Accident Model and Processes (STAMP) and STPA analysis reveal benefits of ground station redundancy during decompression events.
Area of Science:
- Aviation Safety
- Systems Engineering
- Accident Analysis
Background:
- Commercial airlines face pressure to reduce operating costs through optimized crewing configurations.
- Distributed crewing presents potential safety challenges that require systematic evaluation.
Purpose of the Study:
- To apply the System-Theoretic Accident Model and Processes (STAMP) to assess safety implications of distributed crewing configurations.
- To propose new concepts of operations (CONOPS) and design constraints for distributed crewing.
Main Methods:
- System-Theoretic Process Analysis (STPA) was employed to model control structures for current and distributed crewing.
- Analysis focused on the hazard of rapid decompression, referencing the Helios 255 incident.
Main Results:
- STAMP-STPA identified potential unsafe control actions (UCAs) in a hypothetical distributed crewing model.
- The study demonstrated the safety redundancy offered by a ground station during decompression incidents, mitigating hypoxia risks.
Conclusions:
- Distributed crewing, supported by ground station oversight, offers a viable safety enhancement for commercial aviation.
- The proposed CONOPS and design constraints are crucial for the certification and safe implementation of distributed crewing.
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