Good read, it says the guy may have dropped the pack but it seemed ok.

"A survey of other FES batteries from the in-service fleet revealed the presence of metallic debris in a significant proportion of those batteries examined."

The solution is to improve warning and containment after a fire starts.
That seems good, but would less spare parts help with before the fire starts?

My guess is the pack builder is tightening up his process.
For now, no charge for the spare parts.
Longer term, looks like a really nice system.