The impact severely damaged the aircraft -- which broke into three separate pieces -- and caused the Boeing 737 's engines to shear off the wings . Air crashes are extremely rare , says Bill Hagan , and 80 percent are survivable . Comment: He says new rules require that airframes and seats be made to withstand stronger forces .
Air crashes are extremely rare , says Bill Hagan , and 80 percent are survivable . Comment: He says new rules require that airframes and seats be made to withstand stronger forces .