Offending plastic blank was traced back to manufacturer....
Just as an aside, the debris found in various locations in the fuel system:
- a red plastic sealant scraper
- a piece of black plastic tape
- a piece of brown paper
- a piece of yellow plastic.
- a small piece of fabric or paper
- a small circular disc
Surely this can't be normal. Was it all likely introduced during manufacture, or at later stages during maintenance or refueling?