life shield by coupling fig9 and fig1 oxygen and co2 cylinders are placed under the seat in the cylinder 39 s box at the incident time passenger opens the life shield and after connecting one side of the life shield to seat side hug knee into chest fig1 then wears the air mask and connects the other side of the life shield to the seat then opens the valve to fill the airbags with compressed air aviation incidents occur on land or in water the following will be discussed about the details of using the life seat in various incidents in aviation incidents that happen on land most of the passenger injuries are caused by impact burn and penetration of sharp objects into the passenger 39 s body in this case life seat remarkably reduces the severity of impact incidents on land are divided into two general categories incidents with fire and without fire each case is explained in detail in the following in land incidents without fire most of passenger injuries are caused by impact or penetration of sharp objects into the passenger 39 s body the second layer spread spot impacts and the fourth layer keeps passenger in place as well as damping off impacts in land incidents with fire life seat not only protects passenger from impact and penetration of sharp objects into the passenger 39 s body but also builds a thermal insulation around the passenger and provides necessary conditions for passenger survival for a short period of time about 15 min dry ice passes inside the passenger compartment around the passenger to cool the passenger compartment during of fire the cooling gas passes through the ducts which.