Soyuz to be fixed at Space Station

Russian space engineers say the bolts at one particular location failed to
work properly during each of the two previous Soyuz landings...
http://www.msnbc.msn.com/id/25399516/
....Russian experts have told NASA that the bolts at position 5 apparently
failed to fire during both previous Soyuz descents...If all goes as
planned, the bolt in its protective canister will be returned to Earth
inside the Soyuz when it lands in October. The Russians will study the bolt
to determine if the recent failures represented some fabrication flaw or
merely random coincidences...

(Wiring) fabrication flaw or (Bolt) fabrication flaw and random coincidence?

Bad bolt, then they found the problem, and the risk to this entry was
reduced by 1/5 th, as the other four positions could randomly have two bad
bolts. Removing another bolt would reduce the risk by another 1/5th.

Good bolt, keep looking. If it's a wiring problem with position 5 then the
risk to this entry was eliminated with the removal of the bolt.
--
Craig Fink
Courtesy E-Mail Welcome @

"Craig Fink" wrote in message
m...

Bad bolt, then they found the problem, and the risk to this entry was
reduced by 1/5 th, as the other four positions could randomly have two bad
bolts. Removing another bolt would reduce the risk by another 1/5th.

Good bolt, keep looking. If it's a wiring problem with position 5 then the
risk to this entry was eliminated with the removal of the bolt.

Are they going to replace the bolt?

"Alan Erskine" wrote in message
...
"Craig Fink" wrote in message
m...

Bad bolt, then they found the problem, and the risk to this entry was
reduced by 1/5 th, as the other four positions could randomly have two
bad
bolts. Removing another bolt would reduce the risk by another 1/5th.

Good bolt, keep looking. If it's a wiring problem with position 5 then
the
risk to this entry was eliminated with the removal of the bolt.

Are they going to replace the bolt?

From what I've read, they are just going to remove it. The Russians have
said the other bolts would hold the sections together until they need to be
separated.

George

"George" wrote in message
.. .

"Alan Erskine" wrote in message
...
"Craig Fink" wrote in message
m...

Bad bolt, then they found the problem, and the risk to this entry was
reduced by 1/5 th, as the other four positions could randomly have two
bad
bolts. Removing another bolt would reduce the risk by another 1/5th.

Good bolt, keep looking. If it's a wiring problem with position 5 then
the
risk to this entry was eliminated with the removal of the bolt.

Are they going to replace the bolt?

From what I've read, they are just going to remove it. The Russians have
said the other bolts would hold the sections together until they need to
be separated.

George

They hope. phew. At least they're doing something; it also shows how
desparate they are about this problem and seem to realise that it's
life-threatening.

Hmm, time was that anyone fiddling with bolts that had any pyro devices
associated with them was a no no for flight crew. Are we saying that these
are definitely categorically safe to fiddle with?
I imagine very few bolts would actually be needed to hold things together
now, as most of the stress was probably at launch anyhow.

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"Craig Fink" wrote in message
m...
Russian space engineers say the bolts at one particular location failed to
work properly during each of the two previous Soyuz landings...
http://www.msnbc.msn.com/id/25399516/
...Russian experts have told NASA that the bolts at position 5 apparently
failed to fire during both previous Soyuz descents...If all goes as
planned, the bolt in its protective canister will be returned to Earth
inside the Soyuz when it lands in October. The Russians will study the
bolt
to determine if the recent failures represented some fabrication flaw or
merely random coincidences...

(Wiring) fabrication flaw or (Bolt) fabrication flaw and random
coincidence?

Bad bolt, then they found the problem, and the risk to this entry was
reduced by 1/5 th, as the other four positions could randomly have two bad
bolts. Removing another bolt would reduce the risk by another 1/5th.

Good bolt, keep looking. If it's a wiring problem with position 5 then the
risk to this entry was eliminated with the removal of the bolt.
--
Craig Fink
Courtesy E-Mail Welcome @

"Brian Gaff" wrote in message
om...
Hmm, time was that anyone fiddling with bolts that had any pyro devices
associated with them was a no no for flight crew. Are we saying that these
are definitely categorically safe to fiddle with?

No. It shows how desparate they are to fix it.

Alan Erskine wrote:
"Brian Gaff" wrote in message
om...
Hmm, time was that anyone fiddling with bolts that had any pyro devices
associated with them was a no no for flight crew. Are we saying that these
are definitely categorically safe to fiddle with?

No. It shows how desparate they are to fix it.

Stated another way, they consider the risk incurred by the cosmonauts
fiddling with the pyrobolts is less than the risk incurred by performing
the next Soyuz entry without inspecting the bolts.

"Jorge R. Frank" wrote in message
...
Alan Erskine wrote:
"Brian Gaff" wrote in message
om...
Hmm, time was that anyone fiddling with bolts that had any pyro devices
associated with them was a no no for flight crew. Are we saying that
these are definitely categorically safe to fiddle with?

No. It shows how desparate they are to fix it.

Stated another way, they consider the risk incurred by the cosmonauts
fiddling with the pyrobolts is less than the risk incurred by performing
the next Soyuz entry without inspecting the bolts.

Have the crew trained for such a thing? I wouldn't have thought they'd have
the right tools for removal either as it's a rather specialised device.

If they're not trained, I hope they've said farewell to their families, just
in case. I'm not confidant at all of success on this task.

Alan Erskine wrote:
"Jorge R. Frank" wrote in message
...
Alan Erskine wrote:
"Brian Gaff" wrote in message
om...
Hmm, time was that anyone fiddling with bolts that had any pyro devices
associated with them was a no no for flight crew. Are we saying that
these are definitely categorically safe to fiddle with?
No. It shows how desparate they are to fix it.
Stated another way, they consider the risk incurred by the cosmonauts
fiddling with the pyrobolts is less than the risk incurred by performing
the next Soyuz entry without inspecting the bolts.

Have the crew trained for such a thing? I wouldn't have thought they'd have
the right tools for removal either as it's a rather specialised device.

The tools were brought up on the most recent Progress.

"Jorge R. Frank" wrote in message
...

The tools were brought up on the most recent Progress.

What about the training? That's got to be tough.