plane stable is fished out of the bay 100 miles away from the mountain. >> it was quite a distance from the crash site. it departed the plane early. you ask the question what could cause a decompression, control problems and the loss of a vertical fin. >> investigators learn there was previous damage to the aft pressure bulkhead. that is the structure at the back of the cab than keeps the cabin pressurized. it was cracked seven years before the crash. when the plane's tail dragged along the runway in a tail strike. >> the tail strike can happen on the runway or it can occur on landing where the airplane is in a tail-low, nose-high attitude. either way is it going to create a damage. >> the repair is problematic.