Often stuff has to be repaired for training and its not equipment that would ever be used in combat. It would not be an issue if it fails again in fact it would be useful for training if it does. You dont have to simulate failure and people learn if their repair is actually lasting.
I did train soldier on technical equipment (not in the US) and we would have broken or known unreliable parts given out so they learn how to find it. Also we had no authorization to repair most stuff and sometimes it was hard to keep broken parts to use the for training because these parts where scheduled for maintenance witch would mean the manufacturer of the part would replace it and turning the perfectly "good" part for training into e-waste.
It's the classic problem in hierarchical structure. The top just never gets what the people at The bottom really want and need. They cant warp their head around why a broken part could be of more value than having 100% of the replacement parts functional all the time.
I did train soldier on technical equipment (not in the US) and we would have broken or known unreliable parts given out so they learn how to find it. Also we had no authorization to repair most stuff and sometimes it was hard to keep broken parts to use the for training because these parts where scheduled for maintenance witch would mean the manufacturer of the part would replace it and turning the perfectly "good" part for training into e-waste. It's the classic problem in hierarchical structure. The top just never gets what the people at The bottom really want and need. They cant warp their head around why a broken part could be of more value than having 100% of the replacement parts functional all the time.