"Robert M. Gary" wrote in message
ups.com...
http://tinyurl.com/ybrdft
"The bolt most likely came from a Boeing 747 or 767, Ten reported.
Sydney Airport officials said no aircraft had reported mechanical
problems, Ten said,
==which suggested the bolt wasn't in use at the time it fell from
the plane==
, Ten said." (emphasis added)
Good thing they didn't try to use the bolt in flight. 
-Robert
I remember as a boy growing up on a farm in Idaho finding various aircraft
parts in a field while plowing. Always wondered what type of aircraft the
could have fallen from.
Allen