That's true, Sid.
But.. it couldn't have been "tumbling" for very long, rotors stopped, from 1000 feet - about 5 seconds? It ended up nose down, the supply tank to main tank flowback ports - "overflow channels" aren't very big. It seems difficult to see how the supply tanks could drain so fast or so completely, since any remaining fuel would pool below the "overflow channels" against the forward lower edge of the supply tanks as it rested in the pub.
Plus, fuel warnings were registered in the system.