Andrew Chaplin wrote:
"Dennis" wrote in message
.4...
mike wrote:

Loose Bolts Ground V-22 Ospreys; Four Aircraft in Iraq Will Need Fixes
Copying a WWII saying:

Loose Bolts Crash Choppers!

Similar things are happening with recently introduced helicopters. The crash
of the Cougar Helicopters flight off Newfoundland has prompted the FAA to
issue an airworthiness directive to replace titanium bolts with steel on one
of the gearboxes, and the Cormorant SAR birds have a significant problem with
their tails. This reportedly has been successfully re-engineered for the all
singing, all dancing, slicing, dicing version EH is trying to flog as the next
presidential transport, but the cost to sort out the Cormorants has caused
some chest pains among the air staff.

http://www.vancouversun.com/news/dow...714/story.html

http://www.cbc.ca/canada/newfoundlan...d-replace.html

As far as the S-92s go, apparently fretting and galling of the bolts is
suspected with the Cougar crash as well as in another incident; hence
the switch to steel from titanium.

AHS