From the NTSB Preliminary Report:
The fuel selector handle, fuel selector valve/fuel strainer, and fuel selector torque tube were fire damaged and deformed by impact forces and were separated from the airframe. The fuel selector valve was found between the off and left main tank positions, slightly favoring the left tank position. The fuel selector valve/fuel strainer was opened revealing significant carbon and fire damage.
NTSB Aviation Investigation Preliminary Report - C-FBWH