Luke Moretti has the latest on the crash investigation

CLARENCE CENTER, N.Y. (WIVB) - No one investigates like News 4. We have new information about what may have caused the crash of Flight 3407.

You saw the story first on WIVB.com.

The National Transportation Safety Board now says a preliminary examination of the commuter plane that crashed last month shows no indication of pre-impact system failures or anomalies.

Second, investigators say at this point icing had a minimal impact on the stall speed of the plane.