Free fall of drone

ArduCopter
1

Hi everyone!

We have manufactured a drone weighs 3.3 KGS, during the flight test yesterday the UAS has got crashed from 120 meters altitude.

  1. There was no error observed during the crash, the altitude was gradually decreased during the crash. There was no free fall absorved.
  2. We have performed more than 40 test flights on the UAS till date from the time we manufactured.
  3. We would like to get a perspective on this kind of crash for the UAS.

I am attaching the LOG here for reference.