Three people died when an R22 and a H125 crashed into each other in the air near McMinnville, Oregon, yesterday.
They were two students and a flight instructor.
Even in a mid-air collision, it is important to investigate how maintenance was performed before both helicopters left the ground.
Even if maintenance is not the cause (and officials have not stated that it is), it must be ruled out. They should check the controls, the rotors, and the radios, and review the maintenance logs to see what work was done and who signed it.