[suicideneil]

For the OP- was the missing component found rattling around inside the esc case, or had it completely vanished? That might shed some light on the failure, but 3 of this nature out of thousands is just too random in my mind to be a sign of bad design or soldering or anything else.

Big jump + heavy landing = broken esc > bit of padding under the esc might work wonders, has for me atleast..