This is the jackscrew on the tail assembly that articulates the horizontal stabilizer... also known as the elevator.
This is the jackscrew on the tail assembly that articulates the horizontal stabilizer... also known as the elevator.
Our investigators have concluded that the jackscrew snapped and the elevator was frozen in a fixed position, locking the elevator in a down position which forced the plane into a dive.
The R-47 jackscrew in the tail assembly failed, taking out the horizontal stabilizers, resulting in an unrecoverable dive.
The R-47 jackscrew.
Okay... so how do you sabotage an R-47 jackscrew?
The jackscrew's concealed behind the main plate and the tail section,
Okay, you'd have to remove the plate to get to the jackscrew and then reattach it... pretty big job.
Yeah, right, but severe C.A.T. is rough, and if there's already metal fatigue on a part, like the R-47 jackscrew, the pressure can push it
Sabotage a different part of the plane in order to put stress on the jackscrew?
They assumed the jackscrew cracked, which caused the tail to come apart, because the plane was shaking.
Which, in turn, put pressure on the jackscrew.
Well, hypothetically, if it weren't an accident, might you have engineered the means by which pressure was placed on the tail section, over-stressing the R-47 jackscrew?
If you wanted to overstress the jackscrew, you would remove the tail plate and strip the threads on the vertical stabilizer nut.
It would stress the tail section to the point that even a correctly-maintained jackscrew would fail.
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