Accident investigation covers both accidents and incidents.1 It is covered in Annex 13 of the ICAO Annexes.2 Annex 13 is part of the Chicago Convention.3

International rules for civil aviation, including accident investigation, are based on the Chicago Convention, its Annexes, and associated ICAO documents.3 Candidates often confuse regulation 996/2010 for accident investigation with regulation 376/2014 for occurrence reporting.2 The circumstances and cause of an accident are determined through an investigation.4 The Aircraft Accident Investigation Bureau (AAIB) stresses that its information is preliminary and subject to change.4

The International Civil Aviation Organization (ICAO) was established by the 1944 Chicago Convention.3