Serious Incident

Definition of a Serious Incident

means an occurrence associated with the operation of an aircraft involving circumstances indicating that an accident nearly occurred The incidents listed below are typical examples of serious incidents. This list, however, is not complete and serves only as a general standard for the definition of the term ‘serious incident’.

  • Near collision/near miss, hazardous approaching of two aircraft with at least one aircraft being operated under Instrument Flight Rules requiring an avoiding manoeuvre or when an avoiding manoeuvre would have been appropriate to avoid a collision or an unsafe situation;
  • controlled flight into terrain (CFIT) only marginally avoided;
  • an aborted take-off on a closed or engaged runway, or a take-off from such runway with marginal separation from obstacle(s);
  • a landing or attempted landing on a closed or engaged runway;
  • gross failure to achieve predicted performance during take-off or initial climb;
  • fires or smoke in the passenger cabin or in cargo compartments, even if such fires have been extinguished with extinguishing agents;
  • any event which required the emergency use of oxygen by the flight crew;
  • structural failure of the airframe or engine desintegration which is not classified as an accident;
  • multiple failure of one or several aircraft systems having seriously affected the operation of the aircraft;
  • any case of flight crew incapacitation in flight;
  • any fuel state which would require the declaration of an emergency by the pilot;
  • take-off or landing incidents; incidents such as undershooting or overshooting, overrunning or running off the side of runways;
  • system failures, weather phenomena, operation outside the approved flight envelope or other occurrences which could have caused difficulties in controlling the aircraft;
  • failure of more than one system in a redundancy system which is mandatory for flight guidance and navigation.

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