We were testing an APM:Plane drone in Yuen Long last weekend.
The maiden flight was quite uneventful for the first 4 minutes.
However, the elevator joint broke at the last turn to final approach, and crash to the pond next to the flying field.
The wreckage was salvaged with most electronics re-covered, except the APM. The crash could have averted with a US$0.2 of epoxy glue securing the joint.
Full mission planner telemetry display is available here https://www.youtube.com/watch?v=zad2Ct5HU6Y