Note: This article is a supplement to Safety Occurrence Investigation and has been extracted from Chapter 8 of the First edition of ICAO Doc 9859 - Safety Management Manual. This has now been replaced by the Fourth edition, which is a complete re-write of the document. Nevertheless, the article content is considered still relevant.
 

Information Sources

Information relevant to a safety investigation can be acquired from a variety of sources, including:

a) Physical examination of the equipment used during the safety event. This may include examining the front-line equipment used, its components, and the workstations and equipment used by supporting personnel (e.g. ATCOs, maintenance and servicing personnel).

b) Documentation spanning a broad spectrum of the operation, for example: