I know you're new to the forum, but the past few days you've been asking questions that have been answered to death on this site. At one point, the first 5 new threads in this section were made by you and all of them had been answered previously.
Searching is quite useful, but you must use keywords that are common to get more hits.
I'll give you an example:
Since you want to know about equipment loss due to malfunction lets focus on that.
"Equipment loss" = crash, fly away, swim, drowned, smashed, broken, hard landing, damaged, cracked, etc.
All of the about words have been used to describe loss of equipment in one way or another.
"Malfunction" = loss of control, not accepting input, error, compass error, IMU error, transmitter error, lost connection, no connection etc.
all of the above have been used to describe some sort of malfunction.
Now if you put the two parts of your question together in a search, you will get what you are looking for, I can guarantee it.
Hope that helps!