A Springlock suit is a special animatronic that can be used as both an animatronic and suit. In order to turn the animatronic into "suit mode", you will require a special crank which pushes the endoskeleton and other robotic bits into the sides of the suit, making just enough space to fit a person inside.

How do Springlock suits kill you?

You will die, but it will be slow. You'll feel your organs punctured, the suit will grow wet with your blood, and you will know you're dying for long, long minutes. You'll try to scream, but you will be unable to: your vocal cords will be severed, and your lungs will fill with your own blood until you drown in it.”

Can you survive a Springlock failure?

That limb would be damaged beyond repair, but they'd live. TLDR: Short of a head or torso springlock failure, someone could survive.