Author Topic: Expedition 24 thread (June 2 - September 24, 2010) - Includes ETCS Updates  (Read 187440 times)

Offline Space Pete

Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #160 on: 07/31/2010 02:28 PM »
From ISS On-Orbit Status Report for 30/07/2010:

In DC-1, FE-3 Mikhail Kornienko terminated the discharge process on the second 825M3 Orlan battery pack in the ZU-S recharge unit.

Other post EVA-25 closeout activities included:
• Mikhail & FE-5 Fyodor Yurchikhin configured the SM
  PkhO (Transfer Compartment) and DC-1 to Nominal status.
• CDR Alexander Skvortsov prepared Russian tools to be used in the
  upcoming US EVA-15 (ratchet wrench, extender, tether,
  protective blanket with latch, etc.).

----------

Shannon Walker's 4th Blog Entry from the ISS: "Fixing the toilet. Or, what makes one appreciate simple mechanical systems and the local hardware store".
http://blogs.chron.com/inorbit/2010/07/fixing_the_toilet_or_what_makes_one_appreciate_simple_m_1.html

----------

From ISS On-Orbit Status Report for 31/07/2010:

In DC-1, FE-3 Mikhail Kornienko terminated the discharge process on the third 825M3 Orlan battery pack in the ZU-S recharge unit.
« Last Edit: 07/31/2010 11:17 PM by Space Pete »
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #161 on: 08/01/2010 12:19 AM »
Problems on ISS!

Sleep time was 3 hours ago so I found it interesting that there was chatter on the feed...

Loop Alpha ETCS pump module power was pulled because a short was detected by the RPC that provides power to it. Looking at data dump to see if it's a real problem with overcurrent. If it's not, they are fine and can power back up. It'll take about 30 minutes to get that data.

Still have good cooling for critical equipment in the lab. Node 2 & Node 3 have lost MTL, doing some ground powerdowns. MELFI being powered off.

« Last Edit: 08/01/2010 12:23 AM by rdale »

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #162 on: 08/01/2010 12:21 AM »
In the meantime shift 2 just came onboard, so they have extra hands on deck. While data is coming down they are making two plans:

1) Powerup methods in case this is just a glitch
2) Alternative power if loop alpha is really going offline

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #163 on: 08/01/2010 12:42 AM »
Continuing to do powerdowns as data now completely on the ground for analysis.

IF they cannot get RPC closed, they will perform Loop A Shutdown from Warning handbook 2.674

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #164 on: 08/01/2010 01:13 AM »
I'm not in a position to listen any more tonight, if anyone else wants to help out - be my guest! Unfortunately the archive system is down so nothing will be saved, and the system doesn't accept WAV files.

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #165 on: 08/01/2010 01:16 AM »
They started sending an update just as I typed that...

Loop A ETCS pump is the problem. The RPC is what tripped. We saw evidence that it is the pump itself, and that's bad news. Not for sure, but saw indications.

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #166 on: 08/01/2010 01:16 AM »
RPC tripped to give us protection, which is why there are so many error messages. We might reactivate the RPC to see if the pump will restart, but won't do that unless we are 100% sure that it can't make things worse.

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #167 on: 08/01/2010 01:17 AM »
We closed the comm gaps so we have 4 hours of continuous comm. We may have you move stuff from MELFI-1 to MELFI-2 to save some science, but that would be the only other needed crew interaction.

Offline Targeteer

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #168 on: 08/01/2010 01:57 AM »
On comms still--they are really past their bedtime. (Power?) Loop A is being shut down and they mentioned going to two CMGs thus T2 is being isolated. Also discussing a get to sleep plan.
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline Targeteer

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #169 on: 08/01/2010 02:54 AM »
JEM caution warning system has been deactivated and MELFI 1 to 2 transfer is required and being passed up by voice. Nutrition samples are being transferred.  MELFI 1 is being emptied. Node 2 MDM is about to go down--no cautions expected.
« Last Edit: 08/01/2010 03:06 AM by Targeteer »
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #170 on: 08/01/2010 03:40 AM »
Still working on moving all samples from MELFI-1 to MELFI-2. A little confusion on what samples are in what drawers, but seems like things are flowing. They put them in cold bags apparently using "ice bricks" and goal is to take anything out of the sections.

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #171 on: 08/01/2010 03:44 AM »
Page 5 of http://www.boeing.com/defense-space/space/spacestation/systems/docs/ISS%20Active%20Thermal%20Control%20System.pdf has a graphic on the loops, and what they each are responsible for.

Page 9-10 describes the pump module.
« Last Edit: 08/01/2010 03:45 AM by rdale »

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #172 on: 08/01/2010 03:46 AM »
MELFI transfers are complete. Still marching down the procedure to shut things down. Ground is looking at tomorrow's timeline to shift things that they can so crew can sleep as long as possible.

One thing was on the schedule for 8am, if the crew does it now (just a 5 minute procedure) then they won't need to wake them up. Should be able to get to bed in about 5-10 minutes.
« Last Edit: 08/01/2010 03:47 AM by rdale »

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #173 on: 08/01/2010 03:52 AM »
Few more small issues - In Columbus, power down PWS1 and SSC7. In JEM, make sure window shutters are closed.

Online Chris Bergin

Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #174 on: 08/01/2010 03:56 AM »
Good work with the updates Rob and Targeteer!

Offline rdale

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #175 on: 08/01/2010 04:06 AM »
Working in Node 1 Port 4 rack area, they will be performing procedure from ISS IFM 2.3.405 (don't recall ever seeing the manual.) Need to get a jumper and temp stow it there for later work.

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #176 on: 08/01/2010 04:08 AM »
Ground is not final on doing that tonight, leaning towards tomorrow morning, looking for crew input for how long that takes.

Ground is about to start spinning down CMG 1 & 4.

[Jumping way ahead of the curve, but I do recall a spare pump module was sent up a few flights back?]

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #177 on: 08/01/2010 04:08 AM »
CMGs 1 and 4 are about to spin down...
Best quote heard during an inspection, "I was unaware that I was the only one who was aware."

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #178 on: 08/01/2010 04:14 AM »
Thanks for the assist Targeteer - it's too late for me already so I'll let you finish up if they have more words tonight...

I've attached a zipfile of some of the callup audio.
« Last Edit: 08/01/2010 04:15 AM by rdale »

Offline The-Hammer

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Re: Expedition 24 thread (June 2 - September 24, 2010)
« Reply #179 on: 08/01/2010 04:34 AM »
Jumping way ahead of the curve, but I do recall a spare pump module was sent up a few flights back?

There are four spare pump modules on-orbit:
1 each on ESP-2 (STS-121), ESP-3 (STS-127), ELC-1 (STS-129), ELC-2 (STS-129).
Grant Imahara: Oxygen deficiency alarm? Is that something I should be worried about?
NASA worker: Only if it goes off.

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