Hazard Analysis - Severity Definitions - Safety Related

Safety Related

Severity Definition
Catastrophic Results in multiple fatalities and/or loss of the system
Hazardous Reduces the capability of the system or the operator ability to cope with adverse conditions to the extent that there would be:
  • Large reduction in safety margin or functional capability
  • Crew physical distress/excessive workload such that operators cannot be relied upon to perform required tasks accurately or completely
  • Serious or fatal injury to small number of occupants of aircraft (except operators)
  • Fatal injury to ground personnel and/or general public
Major Reduces the capability of the system or the operators to cope with adverse operating conditions to the extent that there would be:
  • Significant reduction in safety margin or functional capability
  • Significant increase in operator workload
  • Conditions impairing operator efficiency or creating significant discomfort
  • Physical distress to occupants of aircraft (except operator) including injuries
  • Major occupational illness and/or major environmental damage, and/or major property damage
Minor Does not significantly reduce system safety. Actions required by operators are well within their capabilities. Include:
  • Slight reduction in safety margin or functional capabilities
  • Slight increase in workload such as routine flight plan changes
  • Some physical discomfort to occupants or aircraft (except operators)
  • Minor occupational illness and/or minor environmental damage, and/or minor property damage
No Safety Effect Has no effect on safety

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