On Aug 31, 8:41*pm, DerbyDad03 wrote:
wrote:
I see this kind of problem
all the time when
I work on almost
anything.
This is what
happens when
you have engineers
graduate without
ever holding a
screwdriver in their
hands.

http://in.reuters.com/article/2012/0...idINL2E8JULGK2...

What in that article points to the engineers as being at fault?

Nothing.




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.

Sounds logical.



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
engineering issue.

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.