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These transcripts are for communications with NWA offices over the ARINC radio link and not for communications with the Seattle ATC Center.
They may be the teletype version of those ARINC communications. In any event, they were deleted from the teletype transcripts that Fred Poyner at WSHM had access to just as some transcripts with the Seattle ATC Center were also deleted.
So what! ? Fred Poyner at WSHM was not even a party to the communications passing between parties for the purpose of a search, in 1971-72. And neither were you! I seriously doubt anyone in 1971-72 was anticipating or trying to satisfy a Fred Poyner at WSHM or an R99 demanding complete records and documentation ... in 2008-2019 for their own research project!
I see no evidence important evidence was being DELETED or WITHHELD from parties who needed that information to conduct a search, back in 1971-72. In fact there is a sharing of information complete with all the uncertainties, in order to frame an appropriate search for DB Cooper at the time.
The issue in 1971 was a complete and accurate transmission of facts and evidence
between all the parties involved at the time in 1971-72, in order for the FBI to conduct a search for Cooper at the time. It looks like a historically accurate portrait of the evidence that was available at the time being shared between NWA and the FBI. If anything is missing it would be information being shared by the Air Force with these parties at the time.
Please specify what information you believe was being concealed at the time, and concealed from whom, by whom? Your demands for 'all the records' today is a completely separate matter. Moreover, your contention records have been withheld and/or deleted from view today, is not prima facia evidence the NWA/FBI/AF flight path is wrong. And Eric Ulis' squirreling-around of words alleged said by Cliff Ammerman is not solid evidence of anything either!
And, the fact that Cooper money was found near Vancouver is not prima facia evidence the NWA/FBI/AF flight path is wrong either!