For item P-0901 as you mention. I saw something wrong on tread surface, tread damage after oxidation. Root cause may effect from something scratch and effect to tread check not pass.
We analysis with FN member for find the real root cause. Member confirm this problem effect from casting piece can free rotate during polishing. Effect from the metal rod can’t fix casting pieces
and scratch on tread surface. Can see our summary action as attached email for reference.
I have any question, What do you think about this issue? When you let start to take pre-investigate before information? For item P-3622 you should be verify all off process?
For both item as you require. I don’t’ need to add in list 100%.
Thank you krab.