Machine   : Percent 12 (12%) (technical reasons) (including human failure during 

                design , manufacturing maintenance)

 

 

Surrounding: Percent 15 (15%) (environmental) (mostly airports, ATC, but not

                  forgetting weather, terrain, navaids, lack of support/information, cabin

                  crew, human failures in support services)

 

Source: Yahya Abd. Rahman

 

             Malaysian Bengkel (Workshop) on Accident Prevention, 1990