Machine   :    11% technical reasons.

                     (including human failure during design, manufacturing maintenance)

 

 

Surrounding:   13 % environmental.

                      (mostly airports, ATC. But, not forgetting weather, terrain, navaids,

                      lack of support/information, cabin crew, human failures in support

                      service.

 

 

Source: Yahya Abd. Rahman

             Malaysian Bengkel (Workshop) on Accidents Prevention, 1990