Originally Posted by
kghjfg
I noticed those too, on the picture with the door missing the pin that comes out of the fuselage to engage into the sliding socket on the door looks very short.
It doesn’t look long enough to properly engage and the lock bolt to stop the door sliding back up.
I agree, zooming in on the higher res image of the failed door/plug in post #194 (it's still very hard to be sure I'm not just seeing artefacts in the image) but it almost looks like the visible end of the pin is showing an axial counterbore hole and an uneven surface at about the point that cross bolt would have been?
However if that were the issue then a quick visual inspection of the pins would not find it and the inspection of the other aircraft would surely take longer than it seems to......