I see this kind of problem
all the time when
I work on almost
This is what
you have engineers
ever holding a
screwdriver in their
What in that article points to the engineers as being at fault?
As I read it, the possibility exists that whoever first installed the power
pack may have stripped the bolt hole resulting in a cross threaded bolt the
next it was used. Note the metal shavings they found when they uninstalled
the old one.
I recently broke a bolt on my trailer hitch because I screwed up the hole
when I tried to clean it with a tap. When I tried to install the bolt it
cross threaded and eventually snapped. It was operator error, not an
It could be an engineering issue, IF they specified the
wrong bolt, the wrong thread, etc. But as you point out,
nothing in the article suggests that at all. And it seems
far more likely that it could be something else, ie cross
threaded, parts were not machined so they aligned right,
making cross threading more likely, etc.
That's the problem with astronauts. They're good at the book learning,
but when it comes to actually fixing something, they ain't worth a dog
Seriously, this is a learning experience. It's encountering problems
like this, figuring out what went wrong, and doing it a different way
next time so that doesn't happen again that makes for better designs in
the future. Bad enough this is happening 100 miles above the Earth, but
it'd be game over if it was happening on Mars.
And, truth be told, each of those tiny metal shavings that were blown
away with compressed nitrogen is now travelling through space at
phenomenal speed and threatening all the weather, communications and spy
satellites up there.
========The station, a $100-billion project of 15 countries, is an orbiting
laboratory used for medical and basic science experiments, microgravity
research and technology development.
Has any scientific papers ever been published in peer-reviewed medical
(or other non-engineering) journals based on experiments conducted on
How would you search medline for or scirus for such papers? Look for
"ISS" or "International Space Station" in the author-affiliation? I see
only 9 such papers on scirus, with 8 of them appearing to be more
editorial or informational than scientific.
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