ICAO Doc 9756 Part 3:2012

The purpose of this manual is to encourage the uniform application of the Standards and Recommended Practices contained in Annex 13 and to provide information and guidance to States on the procedures, practices and techniques that can be used in accident and incident investigations. It is issued in four parts and supersedes the Manual of Aircraft Accident Investigation (Doc 6920).

Part III provides guidance for the investigation of all technical areas that could be involved in an aircraft accident or incident. Guidance is also provided for the several phases of an investigation. The content includes wreckage investigation, structures and systems investigation, flight recorders, aircraft performance, etc.