Negative G's breaking wings?????
For a few decades now I have studied anything I can find about air safety. There are sometimes obvious lessons from this data, and sometimes some "not so obvious" lessons. Sometimes just mystery.
Some Aero Commander Shrike accidents have had the ultimate scary "in flight breakup" that has not been explained, and there are remarkable similarities.
Some common factors are,
probable moderate to severe turbulance
probable simultaneous wing failure at the same point on each wing.
Probable high speed maybe at or exceeding VNE
Severe downward forces on outboard wing sections causing breakup.
This aeroplane has a significant "washout" on the wings, and engine nacelles extending forward of the wing leading edge, with significant weight ahead of the wing spar.
I have to wonder if severe turbulence put high positive "g"'s on the aeroplane causing the weight of the engines to twist the wings so that the outboard sections were at a negative angle of attack, generating the high speed and forces to break the wings in a downward direction.
Crazy??
Maybe. but we are getting repetition of some scary things.