It is not a stable year for the civil aviation in 2009, whenever mentioned aviation accidents, there is always a controversy that why is there no parachute on civil aircraft for the passengers. When refer to this issue, many people do not understand, some people even think that that is because cheating on workmanship and materials by airlines. A quick search on the Internet, which is also a lot of explanation given, but no matter how can one explain, someone put forward a variety of cross-examination. But in fact, it has been a final nail on this issue which does not arise any controversy in the civil aviation industry.
We can divide the flight accident into two kinds of the circumstances. One is the aircraft is out of control which is in fact very rare for the modern civil aircraft. Out of control completely means that either the aircraft is in the state of danger which cant be changed, or the aircraft would be exploded. In short, there is no way to stabilize the fuselage. In this case, the aircraft is just like the pot shaken by bartenders hands. Passengers are completely unable to stand, let alone the parachute. But do not worry, this situation is very rare. However, in the vast majority of aviation accidents, the aircraft is still controllable, the rate of controlled landing successfully is very high. Generally speaking, no matter what happened in the aircraft, it would be landed finally, what the pilot need to do is let the aircraft land somewhat lightly, which is not difficult than we imaged.
On the other hand, the parachute may be different. In the condition of minus 40 degrees Celsius and severe depletion of oxygen, ordinary people open the door which would cause the cabin lost pressure, and then hold the parachute to jump. Neither could he pull the umbrella, touch the ground safely or even do not know where to fall. You can imagine, the chance of survival is little. Suppose we are now in an accident, the plane was landing and a parachute is given to you, do you want to jump? Therefore, it is not a wise choice to jump in the circumstances of the future of the landing does not know even if the parachutes are prepared.