I don’t think I’m expressing myself properly.
In most, if not all, of the the FBI files, they repeatedly use the word “oscillations” to refer to the time that Cooper exited the aircraft.
In fact, in Part 41, p. 35 it says “An analysis as to the the cause of this “oscillation”, also referred to as a “pressure bump” or “change in cabin pressure” pointed to the probability that it was caused by the hijacker leaving the aircraft.”
I tend to think of these as two different events. The “oscillations” were caused by Cooper walking down the aft stairs. The “pressure bump” was caused by him jumping.
However, in the mind of the FBI it seems, the oscillations and pressure bump were the same thing. This discrepancy in vocabulary is critical in creating an accurate timeline.
You are all mixed up and confused .... from lack of reading all of the 302s available spread through several Parts spanning a whole time period from approx 11/24 to 12/16. Now Rev R99 chimes in claiming REDACTIONS again and Radios! ... which is nonsense, has nothing to do with anything!
Focus on 302s that use the later term "pressure oscillations" vs the simpler earliest term "oscillations" ..................
Believe the prophet of your choice. There are a bunch of them around each with a story to sell. All are free and all are wrong so far! The FBI did recognise oscillations vs pressure bump, a new term "pressure oscillations" was coined to cover both oscillations and bump ... but stop focusing on the FBI - the FBI did not do any of this engineering, the FBI are not engineers!, the FBI was merely a recipient of all of this work done by NWA engineers, the FAA, and Air Force people!
FBI 302s merely reflect what other people knew, developed, and were doing, and were telling the FBI - I cant stress this enough!
And forget redactions and radios! Fuck redactions and radios! Unless there are transcripts only the FAA has or ever saw, redactions is irrelevant and may not exist anyway! The existing record is enough to know the facts in any event - and Poynter, R99, and Walter Raleigh, and Richard Nixon are irrelevant.
It is a fact Soderlind had to petition the FBI to get the FAA to release information to him. In addition NWA shared data only they had with the FAA! The FBI were merely bystanders trying to keep track of the whole thing so they could launch searches. The FBI tried to serve as intermediaries between diverse parties who otherwise were not even communicating with each other. The FBI needed to launch a search - they needed to know where to search. Its as simple as that!
Read this - note the date 11/25 the day after the hijacking. This is one of the very earliest estimates and they are already focused on a pressure event. By Jan 1-16 they will be using the term "pressure oscillations" ... the terms used change as the understanding changes!
There arent any redactions in the doc below!