I have obviously been very vocal about my belief that the FBI Flight Path is wrong.
With that in mind, I have considered how this is possible and where the error originated. This got me thinking about a few things.
First, it seems universal that everyone agrees with the flight up to the Maylay intersection.
Second, where R99 and I begin to disagree with the FBI’s Flight Path starts with the Maylay intersection and the turn made at that spot.
Third, it seems that everyone universally agrees with the flight path from Canby down to Reno.
Simply put, the area in question—for R99 and me— is the portion from Maylay to Canby.
I have a theory and here it goes:
The FBI Flight Path shows a quite sharp turn at Maylay that ultimately brings the jet over the V23 center line—in other words, east of the V23 center line.
Perhaps this is where an error occurred. Perhaps the jet didn’t make such a sharp turn at Maylay and actually turned just enough to fly parallel to the V23 center line during the first segment after the turn—a nautical mile or so to the west. Then going forward everything else is accurate in terms of the number of degrees that the jet turns as its direction changes.
With this in mind, I mocked up a map (below) that depicts the FBI Flight Path with the blue line and depicts my Theorized Flight Path with the yellow line.
It’s interesting that the Theorized Flight Path brings the jet to a point that could account for the drift of the placard, brings the jet to the west of Tena Bar (noted on the map with a pin drop), and lines up with the unexplained red Xs on the FBI map.
The portion over the Portland area is obviously not exactly the same; however, in both maps the jet does appear to fly a little bit more freely as it lines up and heads toward Canby.
Of course I realize this is a pretty bold theory. But, it may explain where the error (if there was one) originated.