Causes of Aircrash, Reasons behind the Accidents that occurs to an Aircraft

Causes of Aircrash:

One in every four air crashes across the globe can be attributed to error during landing quite similar to this morning's Air India crash in Mangalore in which 158 people were killed.
An analysis by Boeing shows that around 24 per cent of the total 364 plane accidents between 1998 and 2007 were caused by technical or human error while landing.
Of the 364 accidents, more than 85 occurred while landing, the analysis said. Eleven per cent of the total 5,147 fatalities were attributed to accidents due to problems in landing.
The majority of accidents (57 per cent) occurred while the aircraft were cruising, according to the report titled "Statistical Summary of Commercial Jet Airplane Accidents, 1959-2008".
About 12 per cent of accidents took place during takeoff, while 8 per cent during the plane's initial climb and 12 per cent between the period of climb and cruise, accounting for 43 per cent of the total fatalities, said the report.
While descending, there were only 5 per cent of mishaps whereas 10 per cent of accidents occurred during the flight's initial approach and 9 per cent during the final approach before landing. Such accidents resulted in about 27 per cent of total fatalities during the said 10 years.
The report also stated that about 12 per cent of accidents took place during taxing and towing of planes at airports. As far as fatalities are concerned, 1,985 deaths resulted in accidents caused by loss of control in flights. Over 1,100 were killed in accidents classified under controlled flight into terrain, in which a pilot inadvertently flies an aircraft into terrain without knowing about the obstacle. The third biggest reason behind fatal accidents was the failure or malfunction of an aircraft system or component - other than the powerplant. Accidents under this category have killed 655 people in the reported period. Accidents occurred due to "runway excursion" -- a veer off or overrun off the runway surface -- remained the fourth biggest killer, claiming the lives of about 449 people. Such accidents also resulted in nearly 90 external fatalities, according to the report. Today's mishap can be classified under the "runway excursion" category. Midair collisions have killed over 150 people on board and nearly 70 from outside during the said period.