[EricVanWyk]

They should be nearly identical, especially that circuit. You can petition FRCHQ to post the correct schematics - I've tried several times and failed. They were posted correctly last year, but this year's schematic regressed a bit.

It is a TPS5431 or TSP5430 if I recall correctly. The parts are pretty much identical except for maximum input voltage, so the manufacturer selects each year based on availability.

I'd love to see a photo of what happened. I'm specifically interested to know whether Q1 or U7 were also damaged.

I'm a bit confused though - you indicated that your 5V rail was damaged, but that U3 was the one that is missing pieces of itself? That should have taken out the 6V rail instead...