Author Topic: LIVE: Expedition 24 third spacewalk (ETCS PM R&R EVA-2) - August 11, 2010  (Read 99689 times)

Offline anik

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Overview of problem:
http://www.nasaspaceflight.com/2010/08/two-evas-etcs-coolant-pump-module-changeout/

EVA-1:
http://www.nasaspaceflight.com/2010/08/live-critical-iss-spacewalk-replace-coolant-pump/

EVA-2:
http://www.nasaspaceflight.com/2010/08/live-second-eva-with-pump-module-changeout/ - by Chris Gebhardt


EVA: 338th official spacewalk, 210th spacewalk in US spacesuits
Participants: EV-1 Douglas Wheelock (5th EVA), EV-2 Tracy Caldwell Dyson (2nd EVA)
Spacesuits: EMU #3005 (EV-1) and #3009 (EV-2)
Airlock: Quest (90th EVA), ISS (121st EVA)

Expedition 24 Spacewalk Briefing Materials, Aug. 2, 2010:
http://www.nasa.gov/mission_pages/station/expeditions/expedition24/eva_briefing_080210.html

ISS US EVA-16 objectives:
http://www.nasa.gov/directorates/somd/reports/iss_reports/2010/08102010.html

1. Retrieve VTE (Vent Tool Extender) – EV1
2. Close M3 QD (Quick Disconnect) – EV1 [if no leak (or “snowflakes”), keep M3 closed & do not do Step 4 (total time saved if M3 is OK: ~2 hrs EVA time). If large leak reoccurs, open M3 to 90% (with SPD/Spool Positioning Device) and proceed with original steps];
3. Install & Route VTE on S1 truss segment – EV1
4. Close M1/F105 (Male 1/Female 105) QD at S1-to-S0 segment interface – EV1,
5. Close M1/F55 QD at S1 DDCU – EV2
6. Start vent of line & PM (~20 min) – EV2
7. Close M2, close Vent Tool, clean up Vent Tool – EV1/EV2
8. Demate & bag M3 – EV1
9. Break torque on all (4) old PM bolts – EV1
10. Release old PM electricals and 3 bolts – EV2
11. Retrieve AGB (Adjustable Grapple Bar) from ESP-2 (External Stowage Platform 2) – EV1
12. Attach AGB on failed PM – EV1/EV2
13. Remove failed PM from S1 (starboard) truss and stow on POA (Payload ORU Accommodation) on the MT (Mobile Transporter) at WS2 (Worksite 2) – EV1/EV2

Possible get-aheads:

14. C/L bag transfer to ESP-2
15. Vent GN2 (gaseous nitrogen)
16. Break torque on bolts of spare PM
« Last Edit: 08/11/2010 11:36 am by Chris Bergin »

Offline Michael Bloxham

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What time is the EVA scheduled to begin?

Offline aquarius

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At 11:55 GMT or about 3 hours from now.
« Last Edit: 08/11/2010 08:58 am by aquarius »

Offline dsmillman

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EVA's nearly finished with "EVA Prep".

Offline dsmillman

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EVA's now starting EMU Purge sequence (section 1.220 in EVA manual).

Offline butters

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So I assume from the task list above that there will be at least one more EVA after this one to complete the install of the replacement pump module?
« Last Edit: 08/11/2010 10:06 am by butters »

Offline MikeMi.

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So I assume from the task list above that there will be at least one more EVA after this one to complete the install of the replacement pump module?

Yep, third spacewalk will be on Sunday (08.15).

Offline dsmillman

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EMU Purge started.

Offline butters

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NASA TV coverage started.

Offline psloss

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NASA TV coverage started.
Rob Navias is PAO for this EVA.  Weirdly, NASA TV switched in and out of an ISS Update recording at the beginning of coverage.  Again.

Offline psloss

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Shift change upcoming in the flight control room.

Offline psloss

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Sounds like they are working on steps in the EMU prebreathe checklist, but also sounds like they are little behind the timeline.

Prebreathe started at 11:05 GMT.
« Last Edit: 08/11/2010 11:11 am by psloss »

Offline psloss

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Rob Navias providing a nice overview of the plans for today and context.

Offline psloss

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Also a reminder, if you want to listen to the space-to-ground without PAO commentary, NASA is providing that with one of the video downlink streams via the "live mission video" link:
http://www.nasa.gov/multimedia/isslivestream.asx
« Last Edit: 08/11/2010 11:20 am by psloss »

Offline stockman

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a couple of screen grabs before I go to work... todays work area
One Percent for Space!!!

Offline stockman

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live shot from the airlock
One Percent for Space!!!

Offline stockman

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about 35 minutes to depress...
One Percent for Space!!!

Offline stockman

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todays spacewalkers
One Percent for Space!!!

Offline stockman

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Getting SAFER on... (last one for me - have to go to work... stupid job!  :( )
One Percent for Space!!!

Online Chris Bergin

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