It's a pretty standard process to have some parts installed "loose" and tightened at a later time. It could be to ensure fitment, add rigidity or even just to protect the mating surfaces from the elements during transport.

Also it's probably not just because Boeing is gonna open them up that they don't fully secure them. I haven't seen the specs but it's quite common to have a reinspection requirements when disassembling something that was fully installed for stress and damage.

Pretty much nothing in aerospace is left to communications. The assembly manuals are not just complete, they are painfully exhaustive.

[–] PsychedSy@sh.itjust.works 7 points 9 months ago

It's much easier to temp install parts than design tools to hold the parts on the rail car or ship them in crates.

The wingbox gets corrugated plastic covers to keep the elements out during shipping. The wingbox doesn't exactly need help being stout, though.

[–] BCsven@lemmy.ca 3 points 9 months ago

This one said the informal log showed they had to remove the door module ( thus bolts ) but no record of reinstalling them...and they run two logging systems so not all info is captured in the other.