defect or failure. Springs should not fall out of a clutch disc. unfortunately, not much u can do about it except replace the disc. unless its brand new i doubt anyone would give a warranty on a consumable item like that.
Actually, it is actually more common than you'd think. There is a very slight design flaw in the little lips/tabs that hold those springs in place which can cause them to wear down in a specific area, eventually allowing a spring to pop out.
I just read a thread a little while back that did a very good job of explaining this with good pictures and everything. But damned if I can find it again now.
Usually there is some destruction involved, so if yours came out of it okay minus one spring then you are ahead of the game
Hear is a thread on HT about it, it seems to be an ongoing thing. From what i understand,this happens if the clutch pressure plate forks on one side gets weaker,or a hyper extending clutch or the TOB ear breaks can causes the clutch to engage sideways.
That looks just like my old clutch disk, LOL. Installing the tranny sure is a PITA when you're by yourself. Tried to muscle it in but no go. Busted out the engine hoist and that made it a piece of cake. Just have to fill her up w/ Redline MTL and she should be good to go. I also changed out the starter contacts, installed new brushes in the alternator, new drive belts and oil pan gasket too.