What’s this inside my ams HT?

Hi everyone!

I was disassembling my ams ht for reconnecting the air outlet when I saw these white shavings on the bottom. What could it be?

Hazarding a guess: abraded white filament?
I once pulled the filament out while the motor wanted to pull it in. I had shreds everywhere…

:four_leaf_clover: & :crossed_fingers: