LP I don't see anything I posted wrong. Would you please tell me what is. Is it the thousand feet of trashed airplane and people parts that are going to tell the story? Unless the Lear had black boxes in it that is all you have and I don't think they did. If that is the case they can only calculate descent rate and speed when it it hit the mountain. Measure the hole it hit and how far it skidded. End of investigation.