Lattest scuttlebut is bad fuel. Story I heard is that this was a rescue for another operator that apparently got some type of fuel filter bypass warning on taxi out. As I understand, they only took on the min 300 gallons to waive the ramp fee. Again, just a story I'm hearing, but seems very plausible. I think we can all agree that there was fuel on board when they crashed with how badly it burned.

I'm wondering if we're lookin at a BA38 type situation?
British Airways Flight 38 - Wikipedia