Recently my team was testing drone’s activity by taking test flight at different heights but during one of the test flight it crossed yello zone boundary and drone suddenly crashed and after dismentalng of whole components we tested them individually and found that pixhawk v6x and GPS NEO M9N is not woking, and also trouble in connecting it with mission planner. How I can proceed with this issue? Do I have to make any application to district drone controller section as we are college students, what steps we have to go with? please help to resolve this.