Injury Level Taxonomy

Injury Level Taxonomy


The ADREP injury level taxonomy is a set of terms used by ICAO to categorize an occurrence by the highest level of injury sustained by any person in that occurrence and to allow safety trend analysis on these categories. The ADREP injury level taxonomy is part of the ICAO accident data reporting system (ADREP).




For statistical purposes "Fatal" is death from an injury received in the occurrence which occurs within 30 days of the accident.


A serious injury is an injury sustained by a person in an accident and which:

  • requires hospitalization for more than 48 hours, commencing within 48 hours from the date when the injury was received; or
  • results in a fracture of any bone (except simple fractures of fingers, toes, or nose or;
  • involves lacerations which cause severe hemorrhage, nerve, muscle or tendon damage; or
  • involves injury to any internal organ; or
  • involves second or third degree burns, or any burns affecting more than 5 percent of the body surface; or
  • involves verified exposure to infectious substances or injurious radiation.


Any other injuries other than fatal or serious are minor.


Nobody was injured during the occurence.


The injury level is unknown.


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