Author Topic: Expedition 24 thread (June 2 - September 24, 2010) - Includes ETCS Updates  (Read 187522 times)

Online mtakala24

After the ETCS failure, I recall it being said that engineers weren't sure if the PM itself was actually the culprit. Did NASA ever determine root cause or were they forced to go forward with "most likely"?

I got the impression that they weren't sure if its the pump, the controller board or the EMI filters associated with the system, but that they are all contained in the Pump Module which they are replacing.

I also think that they did two tests, where they turned on the PM the normal way, did see the pump start to turn but then the PM shorted, and in another, modified test, the RPCM giving power to the PM tripped when the PM was turned on but the "start pump" command wasn't even given - which would indicate thats it not the actual pump but something else.

Someone might give details and references better than me, though...

Offline Space Pete

From ISS On-Orbit Status Report for 10/08/2010:

FE-2 Tracy Caldwell-Dyson & FE-4 Doug Wheelock completed final preparations for tomorrow's EVA-16. [Activities included configuring tools needed during the spacewalk such as equipment tethers, wire ties, etc., and making further preparations in the A/L EL (Equipment Lock), checking on PGTs #1001 w/battery 1009 for EV-1, PGT #1006 w/battery 1008 for EV-2, backup PGT #1004 w/battery 1006 in bag), filling DIDBs (Disposable In-suit Drink Bags) from PWD (Potable Water Dispenser), verifying installation of HL (Helmet Light) batteries (1029, 1030, 1031 &1035).]

Afterwards, Tracy, Doug & FE-6 Shannon Walker spent ~3 hours on reviewing latest EVA procedures. [The review included revised detailed procedures, a QD operations briefing package, and Robo/SSRMS instructions.]

A teleconference by Tracy, Doug & Shannon with EVA specialists at MCC-Houston wrapped up preps.

In an attempt to restore the failed CO2 sensor in Doug's EMU#3005, Doug set up the sensor to flow O2 through it for an hour to remove the suspected moisture, and then check the sensor's functionality. The procedure worked, and as of now Doug's CO2 sensor is OK.

Working with Doug, FE-3 Mikhail Kornienko retrieved three Russian "Pille-MKS" radiation dosimeters, recorded their dosages in the Reader and equipped each of the two EMUs for tomorrow's spacewalk with a sensor unit (A0306 & A0307). [A third sensor, A0311, which had been in the Reader, was read in manual mode.]

Meanwhile, Shannon:
Reviewed uplinked briefing material on NH3 (ammonia) decontamination procedures and verified hardware readiness.
• Configured the Cupola RWS (Robotic Workstation) as backup for her
  SSRMS ops. on the Lab RWS tomorrow.
• Swapped the DOUG (Dynamic Onboard Ubiquitous Graphics) cable from
  the A31p laptop used for EVA-15 to the SSC-8 (Station Support
  Computer-8), a DOUG-equipped T61p model.
• Verified that telemetry is properly being received from the Robotics
  systems for "driving" the DOUG animation during EVA-16.
• Reviewed the new SSRMS EVA procedures.
• Powered down the amateur/ham radio equipment in the SM to prevent
  RF interference with the spacewalkers.
• Closed the protective shutters of the windows in the US Lab, JPM,
  and Cupola.

After completing preparations of A/L EL for tonight's lockout, Doug (EV-1) and Tracy (EV-2) will begin their "campout" (nachalo desaturatsiy = desaturation start) in the A/L with hatch closure and depressurization of the CL (Crew Lock) from 14.7 to 10.2 psi, followed by mask prebreathe with oxygen (~7:55 PM to 9:00 PM GMT) and sleep from 9:30 PM to 6:00 AM GNT. [The CL hatch will then be cracked (i.e., temporarily repressurized to 14.7 psi) for a hygiene break/with mask prebreathe for Tracy & Doug at 6:35 AM to 7:45 AM GMT. Shannon will provide suited support in the A/L around 7:45 AM GMT, the hatch will be closed again for EVA preps in 10.2 psi (7:45 AM to 9:15 AM GMT), followed by EMU purge (~9:15 AM to 9:30 AM GMT) & prebreathe (~9:30 AM to 10:20 AM GMT). Afterwards, Walker will support CL depressurization until egress at ~10:55 AM GMT.]

Steps for EVA-16 will be:
1.  Retrieve VTE (Vent Tool Extender) – EV-1.
2.  Close M3 QD – EV-1 [If no leak (or "snowflakes"), keep M3 closed & do not do Step 4
     (total time saved if M3 is OK = ~2 hours 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 – EV-1.
4.  Close M1/F105 (Male 1/Female 105) QD at S1-to-S0 interface – EV-1.
5.  Close M1/F55 QD at S1 DDCU (DC to DC Conversion Unit) – EV-2.
6.  Start vent of line & PM (~20 minutes) – EV-2.
7.  Close M2, close Vent Tool, clean up Vent Tool – EV-1/EV-2.
8.  Demate & bag M3 – EV-1.
9.  Break torque on all (4) old PM bolts – EV-1.
10. Release old PM electricals and 3 bolts – EV-2.
11. Retrieve AGB (Adjustable Grapple Bar) from ESP-2 – EV-1.
12. Attach AGB to failed PM – EV-1/EV-2.
13. Remove failed PM from S1 Truss and stow on POA on the MBS at
     WS-2 (Worksite-2) – EV-1/EV-2.

Possible get-aheads:
1.  C/L bag transfer to ESP-2.
2.  Vent GN2.
3.  Break torque on bolts of spare PM.
« Last Edit: 08/10/2010 07:52 PM by Space Pete »
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Offline Chandonn

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Looks like Bill Harwood has the updated timeline for tomorrow's EVA:

http://www.cbsnews.com/network/news/space/recent.html


Offline marshallsplace

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From ISS On-Orbit Status 08/11/10:


Stage EVA-16 by FE-4 Douglas Wheelock & FE-2 Tracy Caldwell-Dyson was completed successfully in 7hr 26min, fully accomplishing its objective of removing the failed ETCS (External Thermal Control System) Loop A PM (Pump Module) and setting the stage for EVA-17, tentatively to be scheduled on 8/15 (Sunday).

During the spacewalk, Wheelock (EV1) & Caldwell-Dyson (EV2), supported by FE-5 Fyodor Yurchikhin as IV (intravehicular crewmember) plus FE-6 Shannon Walker & CDR Alex Skvortsov on the SSRMS (Space Station Remote Manipulator System), –
Relocated the Stbd CETA (Crew & Equipment Translation Aid) cart – EV2Closed & demated the M3 QD (Quick Disconnect) – EV1 (hurrah, no leakage!)Removed five electrical connectors on the failed PM – EV2Broke torque on all four attachment bolts of the failed PM – EV1Closed & removed the M2 QD – EV2Released 5 electrical cables & 3 (of 4) bolts of the old PM – EV2Retrieved AGB (Adjustable Grapple Bar) from ESP-2 (External Stowage Platform 2) – EV1Attached AGB on failed PM – EV1/EV2Removed failed PM from S1 truss and stowed it on POA (Payload ORU Accommodation) on the MT (Mobile Transporter) at WS2 (Worksite 2) – EV1/EV2Transferred the C/L (Crewlock) bag to ESP-2 adjacent to the A/L (Airlock) – EV2Removed 3 electrical cables on the spare PM on ESP-2Re-covered the spare PM with MLI (Multi-Layered Insulation) blanketCleaned up & ingressed.

(Good news: Since the M3 QD showed no NH3 leakage upon closing (except for a few “snowflakes”), closure of both the M1/F55 (Male 1/Female 55) QD at the S1 DDCU (DC-to-DC-Converter Unit) near the S1-to-S3 segment interface and the M1/F105 QD at the S1-to-S0 interface became unnecessary, as well as line venting - most likely due to the overnight reduction of the internal loop pressure to saturation pressure).

[EV1 & EV2 began their “campout” last night in the U.S. Airlock (A/L) with hatch closure and depressurization of the Crewlock (CL) from 14.7 to 10.2 psi, followed by mask prebreathe. Following the usual hygiene break/with mask prebreathe for Caldwell-Dyson & Wheelock at ~3:35am-4:45am (about one hour later than planned due to the late bedtime for crew and ground teams last night), the A/L hatch was closed again by Shannon Walker & Fyodor Yurchikhin for EVA preps in 10.2 psi, followed by EMU purge (~6:15am-6:30am) and prebreathe in the EMUs (~6:30am-7:20am). Afterwards, with CL depressurization and EV1/EV2 switching to suit power, EVA-16 began at 8:27am EDT. It ended at 3:53pm, lasting 7h 26 min. It was the 149th spacewalk for ISS assembly & maintenance, the 13th this year, and the 241st for US astronauts, with a total time of 937 hrs 4 min.]

Before the EVA, FE-6 Walker –
Completed the IV (Intravehicular) portion of the EVA “inhibit pad”, i.e., the list of temporary external deactivations in support of the EVA,Set up the RWS (Robotic Workstation) and DOUG (Dynamic Onboard Ubiquitous Graphics) peripherals with the SSC-8 (Station Support Computer 8) T61p laptop, to support SSRMS (Space Station Remote Manipulator System) ops, andOperated the SSRMS, “flying” Douglas Wheelock during the EVA.
During the spacewalk, CDR Skvortsov assisted Walker on the SSRMS, and FE-5 Yurchikhin worked with her, supporting the Campout, prebreathe, EVA prep, EVA inhibit pad ops & post-EVA activities.

Yurchikhin also configured the internal STTS communications connections for the EVA and afterwards reconfigured the STTS.

Offline Space Pete

From ISS On-Orbit Status Report for 12/08/2010:

FE-2 Tracy Caldwell-Dyson & FE-4 Doug Wheelock completed the usual post-EVA activities in the US A/L, including:
• Recharging the EMUs with water, using PWR (Payload Water Reservoir)
  #1027, #1024 (backup, may have required degassing) & CWC #1059.
• Attaching the spacesuit LTAs (Lower Torso Assemblies) to the HUTs
  (Hard Upper Torsos).
• Initiating recharge of EVA batteries in the BSA
  (Battery Stowage Assembly) for EVA-17 – i.e., EMU batteries #2086 &
  #2088 plus 4 HL (Helmet Light), 2 PGT & 2 REBA units.
• Deconfiguring the A/L after the EVA.

Doug had ~90 minutes to inspect all safety & waist tethers plus D-ring extenders used on EVA-16 for structural integrity. [Wheels' downlink: "Tether inspection complete, with no discrepancies. All tethers are in great shape".]

Afterwards, Wheelock installed METOX (Metal Oxide) canisters #0005 & #00015 in the A/L bake-out oven and initiated regeneration of the reusable CO2 absorber units.

Tracy, Doug & FE-6 Shannon Walker joined for a 1 hour debrief on yesterday's EVA-16 with ground specialists, answering & discussing a number of questions for the next contingency spacewalk, EVA-17, now scheduled on 16/08 (Monday).

ETCS Loop A PM Update:
EVA-16 went extremely well yesterday. The failed PM was successfully removed and placed on the MBS POA for temporary storage. Some get-ahead work was done to prepare the new pump for installation on the next EVA, such as disconnecting data lines and heaters to the new pump. The M3 QD was closed without leaking (the cause of the initial ammonia leak during EVA-15 was most likely either minor contamination or ice which then cleared). The internal line pressure was lowered pre-EVA, which also could have contributed to M3's proper behaviour which allowed the crew to ignore steps involving time-consuming closing of other QDs and venting the interface. Both crew and ground teams were well prepared and at peak performance.
« Last Edit: 08/12/2010 08:44 PM by Space Pete »
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Offline jacqmans

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MEDIA ADVISORY: M10-114

NASA PLANS NEXT SPACE STATION REPAIR SPACEWALK FOR MONDAY

HOUSTON -- The third spacewalk to restore full cooling capability to
the International Space Station is scheduled for Monday, Aug. 16.

Expedition 24 Flight Engineers Doug Wheelock and Tracy Caldwell Dyson
will venture outside to install a replacement pump and connect its
electrical and fluid lines. The two NASA astronauts conducted the
first two spacewalks to remove the failed ammonia pump from the
station's truss, or backbone.

The pump removed during Wednesday's spacewalk failed on July 31,
causing a loss of half of the station's cooling system. Since then,
the station has been operating normally while a second ammonia pump
provides cooling for electronics.

NASA Television coverage will begin Monday at 5 a.m. CDT. Wheelock and
Caldwell Dyson are scheduled to begin the spacewalk just before 6
a.m. Monday's spacewalk will be the sixth for Wheelock and the third
for Caldwell Dyson.

Approximately two hours after the conclusion of the spacewalk, NASA TV
will broadcast a briefing from NASA's Johnson Space Center in
Houston. The briefing participants will be Kirk Shireman,
International Space Station deputy program manager; Courtenay
McMillan, Expedition 24 spacewalk flight director; and David Beaver,
Expedition 24 spacewalk officer.

Reporters may ask questions from participating NASA locations, and
should contact their preferred NASA center to confirm participation.
Johnson's newsroom will be open for credentialed reporters to attend
the briefing. Johnson also will operate a telephone bridge for
reporters with valid media credentials issued by a NASA center.

Journalists planning to use the service must contact the Johnson
newsroom at 281-483-5111 no later than 15 minutes prior to the start
of the briefing. Phone bridge capacity is limited and will be
available on a first-come, first-served basis.

Offline rdale

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EVA timeline & PPT were sent up to the crew overnight in time for today's EVA conference.

Offline Space Pete

From ISS On-Orbit Status Report for 13/08/2010:

Wrapping up her post-EVA cleanup activities in the US A/L, FE-2 Tracy Caldwell-Dyson:
• Terminated regeneration of METOX (Metal Oxide) canisters #0005 & #00015 in the
  bake-out oven, restowing the canisters in a bag (#1038).
• Installed METOX cans #0016 & #0019 for regeneration.
• Verified completed charging on HL (Helmet Light) and PGT batteries in the BSA
  (Battery Stowage Assembly).
• Re-installed HL & PGT batteries for use in EVA-17.
• Temporarily stowed EMU batteries #2086 and REBAs
  (Rechargeable EVA Battery Assemblies) for EVA-17.

ETCS Loop A PM Update:
EVA-17 is currently planned for Monday 16/08. A Readiness Review is set for Sunday 15/08. Preliminary objectives for EVA-17 include:
• Install spare PM.
• Mate spare PM QDs.
• Clean up spare PM & S1 CETA cart.
• Re-couple Starboard & Port CETA carts.
• Clean up SSRMS (e.g., remove APFR) for walkoff.
• Clean up tethers at S1 Truss segment.
• Install J612 extension cable (for PMM on STS-133/ULF-5).
• Cleanup/Ingress.
« Last Edit: 08/13/2010 08:33 PM by Space Pete »
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Offline robertross

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Nice to see the extension cable for the future PMM included in there. Priorities.
Remembering those who made the ultimate sacrifice for our rights & freedoms, and for those injured, visible or otherwise, in that fight.

Offline Space Pete

From ISS On-Orbit Status Report for 14/08/2010:

Happy Birthday, Tracy!

FE-2 Tracy Caldwell-Dyson, FE-4 Doug Wheelock & FE-6 Shannon Walker joined up for a ~2 hour procedures review for the next contingency spacewalk, EVA-17.

After Tracy terminated the regeneration of METOX (Metal Oxide) canisters #16 & #19 in the US A/L bake-out oven and restowed them in a bag (#1038), Tracy & Doug installed METOX cans #22 & #21 plus EMU batteries #2087 & #2086 in their EMUs, 3005 (EV-1) & 3009 (EV-2), respectively. Tracy then also installed REBAs (Rechargeable EVA Battery Assemblies) #1008 & #1012 in the EMUs.

A teleconference by Tracy, Doug & Shannon with EVA specialists at MCC-Houston wrapped up preps.

In preparation for EVA-17, Shannon charged the two batteries for the EVA D2Xs cameras. About 3 hours later, she configured the cameras for the EVA.
« Last Edit: 08/14/2010 10:07 PM by Space Pete »
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Online dsmillman

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Does anyone know if the ISS MMT has approved Monday's EVA (#17)?  The MMT met this morning.

Offline psloss

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NASA.gov ISS page says yes:
http://www.nasa.gov/mission_pages/station/main/index.html

Quote
After completing several days of analysis and refining procedures, International Space Station managers and mission operations personnel met Sunday and gave final approval for a third spacewalk Monday by Expedition 24 Flight Engineers Doug Wheelock and Tracy Caldwell Dyson to install a spare ammonia pump in the station’s starboard truss as well as approval to restart and activate half of the station’s cooling system that became inoperable two weeks ago due to a failure of the pump in the station’s starboard truss.

Offline Space Pete

From ISS On-Orbit Status Report for 15/08/2010:

FE-2 Tracy Caldwell-Dyson & FE-4 Doug Wheelock completed final preparations for tomorrow's Contingency EVA-17. [Activities included configuring tools needed during the EVA such as equipment tethers, wire ties, D-ring extenders, etc., and making further preparations in the US A/L EL (Equipment Lock), checking on PGTs #1001 w/battery 1006 for EV-1 & #1006 w/battery 1008 for EV-2, backup #1004 w/battery 1004 in bag, filling DIDBs (Disposable In-suit Drink Bags) from PWD (Potable Water Dispenser), verifying installation of HL (Helmet Light) batteries (1029, 1030, 1031 &1022), etc. Note from Wheelock to MCC-H: "All else checks out according to the tool inventory in the procedure. We just wanted to let you guys know that you are awesome! We're looking forward to working with you and bringing the Station back to life."]

Afterwards, Tracy, Doug & FE-6 Shannon Walker spent ~3 hours on reviewing latest EVA procedures. [The review included revised detailed procedures, a QD operations briefing package, Robo/SSRMS instructions, etc.]

A teleconference by Doug, Tracy & Shannon with EVA specialists at MCC-Houston wrapped up preps.

To ensure a functioning CO2 (carbon dioxide) sensor on his EMU #3005, Doug again set up the sensor to flow O2 through it for an hour to remove any moisture, and then checked the sensor's functionality.

Working with Tracy, FE-3 Mikhail Kornienko retrieved three Russian "Pille-MKS" radiation dosimeters, recorded their dosages in the Reader and equipped each of the two EMUs for tomorrow's EVA with a sensor unit (A0306 & A0307). [A third sensor, A0311, which had been in the Reader, was read in manual mode.]

Preparatory to EVA-17, Shannon:
• Printed out new instructions for actions to be taken in case of occurrence of a
  "next worst failure", e.g. MBSU-2 failure, ETCS Loop B failure, File Server crash, etc.
• Reviewed uplinked briefing material on NH3 (ammonia) decontamination
  procedures and verified hardware readiness.
• Conducted a review of POC (Portable Onboard Computer) DOUG
  (Dynamic Onboard Ubiquitous Graphics) software and teleconference
  with the ROBO and MSS (Mobile Servicing System) Instructor on the
  ground for the SSRMS.
• Powered down the amateur/ham radio equipment in the SM and
  verified closure of the protective window shutters of the Lab, JPM and
  Cupola.

After completing preparations of A/L EL for tonight's lockout, Doug (EV-1) and Tracy (EV-2) will begin their "campout" (nachalo desaturatsiy = desaturation start) in the A/L with hatch closure and depressurization of the CL (Crew Lock) from 14.7 to 10.2 psi, followed by mask prebreathe with oxygen (~6:35 PM to 7:45 PM GMT) and sleep from 9:30 PM to 6:00 AM GMT. [The CL hatch will then be cracked (i.e., temporarily repressurized to 14.7 psi) for a hygiene break/with mask prebreathe for Doug & Tracy at 6:35 AM to 7:45 AM GMT. Shannon will provide suited support in the A/L Around 7:45 AM GMT, the hatch will be closed again for EVA preps in 10.2 psi (7:45 AM to 9:15 AM GMT), followed by EMU purge (~9:15 AM to 9:30 AM GMT) & prebreathe (~9:30 AM to 10:20 AM GMT). Afterwards, Walker will support CL depressurization until egress at ~10:55 AM GMT.]

Activities for EVA-17 will be to:
• Install spare PM mechanically.
• Mate & open spare PM fluid QDs.
• Perform electrical & data continuity checks plus bump-start test
  (by MCC-H, to check pump functionality).
• Re-couple Starboard & Port CETA carts.
• Clean up spare PM/S1/CETA cart.
• Clean up SSRMS (remove APFR for walkoff).
• Install J612 extension cable for PMM on STS-133/ULF-5.
• Clean up tethers at S1 Truss.
• Configure CETA cart to allow for WS-8 (Worksite-8) ops.
• Move old PM to ESP-2/mate minimum electrical connectors (if time allows).
• Cleanup/Ingress A/L.
« Last Edit: 08/15/2010 08:28 PM by Space Pete »
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Online dsmillman

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Online Chris Bergin

And we'll move to a specific live coverage thread on Monday morning. Anik or myself will set it up.

Offline Space Pete

RIA Novosti: "ISS could last another decade - Roscosmos".
http://en.rian.ru/russia/20100816/160224526.html
Electronic Engineer by day, NASASpaceflight's ISS Editor by night | Read my NASASpaceflight articles here

Offline Space Pete

Roscosmos PAO: "ISS can Become a Basis for Mission to Mars - Anatoly Perminov".

Roscosmos Head Anatoly Perminov supports the idea about turning the International Space Station into a basis for future missions to other planets.
"Many people today say that this is feasible for the station. I also support the idea", Roscosmos Head said questioned by The Voice of Russia.
"We shall try, with new technologies capable of flying not only to LEO, but to the other planets. It would be one of options for the ISS", Perminov added.
He also added that a mission to Mars would not take place in the nearest future.
"I believe it’s to happen in 2030-2035, not earlier", Roscosmos Head concluded.

www.roscosmos.ru/main.php?id=2&nid=10112&lang=en



Roscosmos PAO: "China and India would be Useful Partner in the ISS Program - Fyodor Yurchikhin".

The number of the International Space Station program participants may be enlarged by adding China and India, ISS flight engineer Fyodor Yurchikhin said answering the question from the ISS Mail Box. The Mail Box is the project by Memorial Space Museum supported by Roscosmos PAO and Moscow's Department of Culture.
"I am sure that partnership with China and India would be mutually beneficial in the program", Yurchikhin said, Interfax AVN informs.
"Chinese achievements in human space missions are well-known. A Chinese module in the ISS? It is not a fantasy, provided that all parties agree with is", Yurchikhin believes. "But I am against thoughtless involvement; interesting ideas, technologies shall be involved in the program".

www.roscosmos.ru/main.php?id=2&nid=10115&lang=en
« Last Edit: 08/16/2010 09:37 PM by Space Pete »
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Offline marshallsplace

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From ISS On-Orbit Status 08/16/10:


Stage EVA-17 by FE-4 Doug Wheelock & FE-2 Tracy Caldwell-Dyson was completed successfully in 7hr 20min, fully accomplishing its objective of installing the spare ETCS (External Thermal Control System) Loop A PM (Pump Module) plus additional tasks. The PM has been checked out and is functioning nominally. Loop A will be fully in service later this week. This was the third contingency spacewalk to replace the Loop A ammonia pump.

During the excursion, Wheelock (EV1) & Caldwell-Dyson (EV2), supported by FE-5 Fyodor Yurchikhin as IV (intravehicular crewmember) plus FE-6 Shannon Walker & CDR Alex Skvortsov on the SSRMS (Space Station Remote Manipulator System), –
Installed the spare PM (Pump Module) mechanicallyMated & opened associated fluid QDs (Quick Disconnects)Successfully performed electrical & data continuity checks plus bump-start test (by MCC-H, verifying pump functionality)Re-coupled the stbd & port CETA cartsCleaned up spare PM/S1/CETA (Crew & Equipment Translation Aid) cartCleaned up the SSRMS by removing the APRF (Articulated Portable Foot Restraint) to enable SSRMS walkoffInstalled the J612 extension cable for ULF5/PMM (Pressurized Multipurpose Module)Cleaned up tethers at S1 truss segmentConfigured the CETA cart to allow for WS8 (Worksite 8) ops, andCleaned up/Ingressed.
[EV1 & EV2 began their “campout” last night in the U.S. Airlock (A/L) with hatch closure and depressurization of the Crewlock (CL) from 14.7 to 10.2 psi at ~3:55pm for 70 min of mask prebreathe with oxygen. Following the usual hygiene break/with mask prebreathe for Caldwell-Dyson & Wheelock this morning at ~2:35am-3:45am, the A/L hatch was closed again by Walker & Yurchikhin for EVA preps in 10.2 psi, followed by EMU purge and prebreathe in the EMUs. Afterwards, with CL depressurization and EV1/EV2 switching to suit power, EVA-17 began at 6:20am EDT, ~35 min ahead of timeline. It ended at 1:40pm, lasting 7h 20 min. It was the 150th spacewalk for ISS assembly & maintenance, the 14th this year, and the 242nd for US astronauts, with a total time of 944 hrs 24 min.]

Before the EVA, FE-6 Walker –
Verified closure of protective window shutters in Lab, Kibo JPM (JEM Pressurized Module) and Node-3 Cupola,Completed the IV (Intravehicular) portion of the EVA “inhibit pad”, i.e., the list of temporary external deactivations in support of the EVA,Set up the Lab RWS (Robotic Workstation) and DOUG (Dynamic Onboard Ubiquitous Graphics) peripherals with the SSC-8 (Station Support Computer 8) T61p laptop, to support SSRMS (Space Station Remote Manipulator System) ops, andOperated the SSRMS, “flying” Douglas Wheelock during the EVA.
During the spacewalk, CDR Skvortsov assisted Walker on the SSRMS, and FE-5 Yurchikhin worked with her in supporting the Campout, prebreathe, EVA prep, EVA inhibit pad ops & post-EVA activities.

Yurchikhin also configured the internal RS (Russian Segment) STTS communications connections for the EVA.

After ingress from the spacewalk, Tracy, Wheels, Fyodor & Shannon completed initial post-EVA activities in the A/L (Airlock), including –
Doffing backpacks, harnesses, tethers and EMUs (Extravehicular Mobility Units),Inspecting & taking photography of the EMU gloves,Taking some photos of broken threads on the MLI (Multi-Layer Insulation) of the SCU (Service & Cooling Umbilical) connector of Tracy’s spacesuit,Deconfiguring the A/L after the spacewalk,Reconfiguring STTS communications in the RS,Downlinking spacewalk camera imagery,Downlinking the glove photographs for analysis, andRestowing the ammonia masks & NH3 decontamination kit in the FGB.

Offline psloss

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Yesterday's ISS status includes words on reactivating Loop A:
http://www.nasa.gov/directorates/somd/reports/iss_reports/2010/08172010.html

Quote
Doug Wheelock verified proper closure of the protective window shutters in the Kibo JPM (JEM Pressurized Module), Node-3 Cupola, and US Lab, prior to the 6:00am shutdown of CMG1 (Control Moment Gyroscope 1), i.e., its removal from the steering law, and associated thruster firings. [By powering down two DDCUs (DC-to-DC Converter Units, S01A & LA4A) by ground command, CMG-1, ETCS Loop A and other electrical loads were temporarily shut down to safe them for the removal of the Lab/Truss Contingency Jumper which the crew had installed after the DDCU S01A/Loop A pump failure.]

FE-6 Shannon Walker then disconnected and removed the Lab/Truss Contingency Jumper. [Afterwards, the ground began to repower DDCU S01A (restarting ETCS Loop A and turning CMG-1 back on), the Node-2 DDCUs, S0 DDCU S04B & S1 DDCU S14B (repowering CMG-4), plus Kibo JPM & COL (Columbus Orbital Laboratory) core loads.]

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