On Jun 26, 8:10*pm, "Roy Clark, \"B6\"" wrote:
From the current issue of NTSB Reporter:
Close-up: Mid-Air Collision ( March 2010)
History of the Flight
* (No witnesses) so used radar tracting data
Pilot Information
Airplane Information
Meterological Information
Airport Information
Wreckage and Impact Information
Medical and Pathological Information
Tests and Research
* * Airplane Contact Information
* * Collison and Convergence Information
* * Radar Data and Calculated Collison and Convergence Angles
* * Measured Collision and Convergence Angles
Probable Cause

I've been reading this newletter for more than 15 years and the above is a typical outline of the reported NTSB investigation process.

I've never gotten the impression the NTSB would "not bother to solict input from those who can help" and the newletter has not reported the NTSB "can't even get the facts right."

As each issue contains 4 of these "Close-UP" reports: 4/month x 12 issuse/year x 15 years = approximately 720 reports.

Over more than 20 years as a medical expert witness, including cases involving auto, truck, motorcycle, bicycle, boat, train, and aircraft accidents, I've rarely had to request additional data; however, when I have it is promptly provided if available.

Ramy, I am curious as you imply your experience has been different. *Can you share and cite from any of the "many" investigations you mention in which the NTSB did not solicit information from those who could help or got the facts wrong?

Roy,

as an MD and expert witness, perhaps that is why you have not
encountered resistance to your request for information.

Brad