Wife's Panda hit a pothole last week. No visible damage, but 2 days later she was driving to work and suddenly got a scraping noise.
I had taken the wheel off and checked the damper, spring, spring pan and hub flange after the pothole, and it all looked OK.
Got it home and did the same inspection again. Nothing immediately obvious, and the wheel didn't look out of position.
But... the tyre had definitely been rubbing against the fuel filler pipe, destroying it. Wierd!
Lots more light on the subject showed the problem.
Long crack in the beam arm, allowing it to flex wildly when it hit bumps. Then it returned to normal. When unloaded, crack was nearly invisible. Sprayed water on it and it was much more obvious.
Had a new beam ready-built so fairly quick swap, but once it was off I re-checked the spring pan and hub flange. Both completely solid, and other than some flaky surface rust, in very good condition.
Not had one fail like this before, and now I'm wondering how many others look more solid than they are.
(Its more obvious now as I did a torsion test on it once it was off. Explained a lot)