News Space Station suffers Coolant loop issue

[orb]

Spaceflight Now: Wednesday spacewalk to remove failed coolant pump.

1025 GMT (6:25 a.m. EDT)
The Expedition 24 astronauts are getting ready to head outside for the second in a series of repair spacewalks to fix the International Space Station's broken ammonia coolant pump. Today's EVA is scheduled to start around 7:55 a.m. EDT, but preps in the airlock are running about 30 minutes behind schedule at the moment.

 

[Orbinaut Pete]

Timeline of major events (in GMT and Elapsed Time [ET]):

--GMT------ET-----Event
12:55 AM | 00:00 | Suits to battery power.
01:00 AM | 00:05 | Post depress/airlock egress.
01:15 AM | 00:20 | Setup.
01:40 AM | 00:45 | EV-2: Close S1 outboard QD.
01:55 AM | 01:00 | EV-1: Vent line routing.
02:25 AM | 01:30 | EV-1: Inboard S0/S1 jumper QD closed.
02:40 AM | 01:45 | EV-2: M1 ammonia line restrained.
02:55 AM | 02:00 | EV-2: Start venting.
03:05 AM | 02:10 | EV-1: Close M2 ammonia line.
03:35 AM | 02:40 | EV-1: Close vent tool.
03:40 AM | 02:45 | EV-2: Vent tool cleanup.
03:50 AM | 02:55 | EV-1: Close and demate M3 ammonia line.
04:00 AM | 03:05 | EV-2: Cover and restrain M3.
04:10 AM | 03:15 | EV-1: Break torque on failed PM bolts.
04:30 AM | 03:35 | EV-1: Retrieve AGB.
04:30 AM | 03:35 | EV-2: Release failed PM electrical cables.
05:00 AM | 04:05 | EV-2: Release failed PM bolts.
05:15 AM | 04:20 | EV-1: Remove failed PM with AGB.
05:25 AM | 04:30 | EV-2: Remove failed PM.
06:00 PM | 05:05 | EV-1: Move failed PM to stowage fixture (POA).
06:10 PM | 05:15 | EV-2: Break torque on new PM; cleanup.
06:30 PM | 05:35 | EV-1: Cleanup/airlock ingress.
06:55 PM | 06:00 | Airlock pre-pressurization.


NASASpaceFlight: "LIVE: Second EVA picking up with Pump Module changeout".

SPACE.com: "Astronauts Set to Attempt More Space Station Repairs Wednesday".

Florida Today's "The Flame Trench" Blog: "Spacewalkers To Make 2nd Attempt To Extract Faulty Pump".

Florida Today's "The Flame Trench" Blog: "Orbital Maintenance Workers Start Spacewalk At Station".


Spaceflight Now's Mission Status Center.

SPACE.com's live EVA updates.

 

[orb]

And one more link - Spaceflight Now: Spacewalk No. 2 begins
- with updated times of events:

EDT........HH...MM...EVENT

08:27 AM...00...00...Suits to battery power
08:32 AM...00...05...Post depress/airlock egress
08:47 AM...00...20...Setup
09:12 AM...00...45...EV-2: Close S1 outboard QD
09:27 AM...01...00...EV-1: Vent line routing
09:57 AM...01...30...EV-1: S0/S1 inboard jumper QD closed
10:12 AM...01...45...EV-2: M1 ammonia line restrained
10:27 AM...02...00...EV-2: Start venting
10:37 AM...02...10...EV-1: Close M2 ammonia line
11:07 AM...02...40...EV-1: Close vent tool
11:12 AM...02...45...EV-2: Vent tool cleanup
11:22 AM...02...55...EV-1: Close and demate M3 ammonia line
11:32 AM...03...05...EV-2: Cover and restrain M3
11:42 AM...03...15...EV-1: Break torque on failed pump module bolts
12:02 PM...03...35...EV-1: Retrieve adjustable grapple bar
12:02 PM...03...35...EV-2: Release failed PM electrical cables
12:32 PM...04...05...EV-2: Release failed PM bolts
12:47 PM...04...20...EV-1: Remove failed PM with AGB
12:57 PM...04...30...EV-2: Remove failed PM
01:32 PM...05...05...EV-1: Move failed PM to POA
01:42 PM...05...15...EV-2: Break torque on new PM; cleanup
02:02 PM...05...35...EV-1: Cleanup/airlock ingress
02:27 PM...06...00...Airlock pre-pressurization

 

[N_Molson]

EVA activities while the station is orbiting the night side of the Earth is not the best part I guess... And there's no air to diffuse the light of the headlights.

When using UMmu in Orbiter I tend to avoid night EVA as much as possible

The EVA seems to go rather well. Tracy is disconnecting the electrical & data wires of the failed module.

 

[Orbinaut Pete]

All is going well so far! :thumbup:


Updated EVA timeline (in GMT and Elapsed Time [ET]):

---GMT----- ET----EVENT
03:42 AM | 03:15 | EV-1: Break torque on failed PM bolts.
04:02 PM | 03:35 | EV-1: Retrieve AGB.
04:02 PM | 03:35 | EV-2: Release failed PM electrical cables.
04:32 PM | 04:05 | EV-2: Release failed PM bolts.
04:47 PM | 04:20 | EV-1: Remove failed PM with AGB.
04:57 PM | 04:30 | EV-2: Remove failed PM.
05:32 PM | 05:05 | EV-1: Move failed PM to POA.
05:42 PM | 05:15 | EV-2: Break torque on new PM; cleanup.
06:02 PM | 05:35 | EV-1: Cleanup/airlock ingress.
06:27 PM | 06:00 | Airlock pre-pressurization.

---------- Post added at 04:37 PM ---------- Previous post was at 04:10 PM ----------

All is going well!

All 4 fluid lines are demated from the old PM & stowed, all 5 electrical & data lines are demated from the old PM, and torque has been broken on all 4 bolts on the old PM.

Now Tracy & Wheels are going to install the AGB (Adjustable Grapple Bar) on the old PM, to allow the SSRMS to grapple it & manoeuvre it to the POA (Payload ORU Accommodation) on the MBS (Mobile Base System).

 

[N_Molson]

Ground : *beep* "Actually you're ahead of the timeline" *beep*
Tracy : "Woohoo !"

 

[Orbinaut Pete]

SPACE.com: "Space Station Astronauts Take 2nd Spacewalk to Make Repairs".

Spaceflight Now: "Troublesome ammonia line successfully removed".

BBC News: "Second spacewalk under way to fix ISS cooling units".

---------- Post added at 06:42 PM ---------- Previous post was at 05:17 PM ----------

The old PM is out! Now it's being moved to the POA on the MBS.

 

[orb]

Spaceflight Now:

• Crew preps pump for removal
• Faulty coolant pump removed

---------- Post added at 22:02 ---------- Previous post was at 20:20 ----------

A quote from SFN MSC:

Repressurization of the Quest airlock module began at 3:53 p.m. EDT, marking the official end of today's spacewalk. The EVA lasted 7 hours and 26 minutes.

Today marked the fifth EVA in the career of Doug Wheelock and second for Tracy Caldwell Dyson. Wheelock has accumulated 36 hours and 10 minutes of spacewalking time on his previous excursions and 15 hours and 29 minutes for Caldwell Dyson.

This was the 149th spacewalk devoted to station assembly and maintenance and the 13th so far this year. Total space station EVA time since construction began in 1998 stands at 937 hours and 4 minutes.
​

 

[Orbinaut Pete]

The EVA has ended! Total duration was 7 hours 26 minutes. All objectives were accomplished! Great work, Tracy & Wheels! :thumbup:

---------- Post added at 09:45 PM ---------- Previous post was at 09:07 PM ----------

SPACE.com: "Space Station Astronauts Remove Faulty Pump in Urgent Repairs".

NASASpaceFlight: "Large success for second EVA as failed Pump Module is removed".

Florida Today's "The Flame Trench" Blog: "Spacewalkers Set The Stage For Coolant System Recovery".

 

[N_Molson]

Let's go for the third round ! :thumbup:

 

[Orbinaut Pete]

From ISS On-Orbit Status Report for 11/08/2010:

Stage EVA-16 by FE-4 Doug Wheelock & FE-2 Tracy Caldwell-Dyson was completed successfully in 7 hours 26 minutes, 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 15/08 (Sunday).

During the spacewalk, Doug (EV-1) & Tracy (EV-2), 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 Starboard CETA (Crew Equipment Translation Aid) cart – EV-2.
• Closed & demated the M3 QD (Quick Disconnect) – EV-1 (hurrah, no leakage!).
• Removed five electrical connectors on the failed PM – EV-2.
• Broke torque on all four attachment bolts of the failed PM – EV-1.
• Closed & removed the M2 QD – EV-2.
• Released 5 electrical cables & 3 (of 4) bolts of the old PM – EV-2.
• Retrieved the AGB (Adjustable Grapple Bar) from ESP-2 (External Stowage Platform-2) – EV-1.
• Attached AGB to failed PM – EV-1/EV-2.
• Removed failed PM from S1 Truss and stowed it on the POA (Payload ORU Accommodation) on the MBS (Mobile Base System) at WS-2 (Worksite-2) – EV-1/EV-2.
• Transferred the CL (Crew Lock) bag to ESP-2 adjacent to the US A/L (Airlock) – EV-2.
• Removed 3 electrical cables on the spare PM on ESP-2.
• Re-covered the spare PM with MLI (Multi Layer Insulation) blanket.
• Cleaned up & ingressed.

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

[EV-1 & EV-2 began their "campout" last night in the US A/L with hatch closure and depressurization of the CL from 14.7 to 10.2 psi, followed by mask prebreathe. Following the usual hygiene break/with mask prebreathe for Tracy & Doug at ~7:35 AM to 8:45 AM GMT (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 & Fyodor for EVA preps in 10.2 psi, followed by EMU purge (~10:15 AM to 10:30 AM GMT) and prebreathe in the EMUs (~10:30 AM to 11:20 AM GMT). Afterwards, with CL depressurization and EV-1/EV-2 switching to suit power, EVA-16 began at 11:27 AM GMT. It ended at 7:53 PM GMT, lasting 7 hours 26 minutes. 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 hours 4 minutes.]

Before the EVA, Shannon:
• 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 ops.
• Operated the SSRMS, "flying" Doug during the EVA.

During the spacewalk, Alexander assisted Shannon on the SSRMS, and Fyodor worked with her, supporting the Campout, prebreathe, EVA prep., EVA inhibit pad ops. & post-EVA activities.

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

After assisting in post-EVA activities, Shannon also:
• Downlinked the spacewalk camera imagery.
• Inspected the EMU gloves and downlinked glove photographs for analysis.
• Restowed the ammonia masks and NH3 decontamination kit in the FGB.

---------- Post added at 11:19 PM ---------- Previous post was at 11:17 PM ----------

According to the post-EVA briefing, the third EVA has moved to Monday, and there will be a fourth EVA next week.

---------- Post added 12th Aug 2010 at 12:39 AM ---------- Previous post was 11th Aug 2010 at 11:19 PM ----------

Spaceflight Now: "Station's bad pump removed; more spacewalking ahead".

SPACE.com: "NASA: 4 Spacewalks Needed to Complete Space Station Repairs".

Florida Today's "The Flame Trench" Blog: "Third Spacewalk To Repair Station Cooling System Now Monday".

---------- Post added at 04:22 PM ---------- Previous post was at 12:39 AM ----------

Florida Today: "Might just right for tricky fix on space station".

NASA TV Video: "Second EVA Completed to Replace Pump on ISS".​

 

[Orbinaut Pete]

As NASA are being slow with images, here's some EVA-15 images from Doug Wheelock via Twitter, along with some very nice captions.

The night prior to our spacewalk…Tracy and I on oxygen masks starting our pre-breathe protocol, preparing to 'campout' in the airlock at reduced pressure (10.2 psi) in oxygen-enriched air (25% oxygen). Just a short time earlier, we heard those exciting words from Mission Control…"Go for EVA"!

A farewell salute to our ISS Commander, Alexander 'Sasha' Skvortsov, as Tracy and I prepare to enter the crewlock to depress to vacuum. Just minutes from the start of our spacewalk. Senses are heightened at this point. Heart and mind are racing. Chance favors the prepared mind in the vacuum and extreme temperatures of space…

Stepping out into the darkness…A view of the crewlock hatch from the window of our Soyuz capsule 'Olympus'. Fyodor captured this shot at the moment I was exiting the airlock to assess the failed Pump Module. There are no words to adequately describe the view and the flood of emotion experienced from this vantage point.

 

[Orbinaut 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 (Airlock), including:
• Recharging the EMUs (Extravehicular Mobility Units) with water, using PWR (Payload Water Reservoir) #1027, #1024 (backup, may have required degassing) & CWC (Contingency Water Container) #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 (Pistol Grip Tool) & 2 REBA (Rechargeable EVA Battery Assembly) 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 (carbon dioxide) 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 (Pump Module) was successfully removed and placed on the MBS (Mobile Base System) POA (Payload ORU Accommodation) 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 (Quick Disconnect) 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.

----------

SPACE.com: "Perseid Meteor Shower Poses Minimal Risk to Spacewalking Astronauts".

---------- Post added 13th Aug 2010 at 09:34 PM ---------- Previous post was 12th Aug 2010 at 09:45 PM ----------

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

Wrapping up her post-EVA cleanup activities in the US A/L (Airlock), 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 (Pistol Grip Tool) 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 (Pump Module).
• Mate spare PM QDs (Quick Disconnects).
• Clean up spare PM & S1 CETA (Crew Equipment Translation Aid) cart.
• Re-couple Starboard & Port CETA carts.
• Clean up SSRMS (e.g., remove APFR (Articulating Portable Foot Restraint)) for walkoff.
• Clean up tethers at S1 Truss segment.
• Install J612 extension cable (for PMM on STS-133/ULF-5).
• Cleanup/Ingress.

 

[SiberianTiger]

Is the spare pump to be ready for operation after EVA-17 is over?

 

[Orbinaut Pete]

Is the spare pump to be ready for operation after EVA-17 is over?

Yes, I think it's just a case of repressurising the ammonia lines & commanding the PM on from the ground.

---------- Post added at 11:05 PM ---------- Previous post was at 12:17 AM ----------

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 (Airlock) 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.

---------- Post added 15th Aug 2010 at 09:29 PM ---------- Previous post was 14th Aug 2010 at 11:05 PM ----------

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 (Airlock) EL (Equipment Lock), checking on PGTs (Pistol Grip Tools) #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 (Quick Disconnect) operations briefing package, Robo/SSRMS (Space Station Remote Manipulator System) 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 (Extravehicular Mobility Unit) #3005, Doug again set up the sensor to flow O2 (oxygen) 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 (Main Bus Switching Unit-2) failure, ETCS (External Thermal Control System) 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 (Service Module) 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 (Pump Module) 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 (Crew Equipment Translation Aid) cart.
• Clean up SSRMS (remove APFR (Articulating Portable Foot Restraint) 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 (External Stowage Platform-2)/mate minimum electrical connectors (if time allows).
• Cleanup/Ingress A/L.

---------- Post added 16th Aug 2010 at 01:10 PM ---------- Previous post was 15th Aug 2010 at 09:29 PM ----------

Spaceflight Now: "Spacewalkers to install new coolant pump Monday".

Florida Today's "The Flame Trench" Blog: "Third spacewalk hopes to revive failed station coolant system".


Spaceflight Now: "Spacewalk No. 3 begins".

NASASpaceFlight: "LIVE: Third ETCS Pump Module changeout spacewalk begins on ISS EVA 150".

SPACE.com: "Space Station Astronauts Tackle Third Spacewalk to Fix Cooling System".

Florida Today's "The Flame Trench" Blog: "Spacewalkers get early start to station repairs".

BBC News: "Space station crew in third spacewalk to repair cooling".


Spaceflight Now's Mission Status Center.

SPACE.com's live EVA updates.

---------- Post added at 01:17 PM ---------- Previous post was at 01:10 PM ----------

EVA timeline (in GMT and Elapsed Time [ET]):

--GMT------ET-----Event
12:25 PM | 01:50 | EV-1: PM install in S1 truss; engage four bolts.
12:25 PM | 01:50 | EV-2: Mate electrical cables.
01:25 PM | 02:50 | EV-1: Mate PM QDs; open valves; install SPDs.
01:25 PM | 02:50 | EV-2: Assist with QDs.
02:50 PM | 04:15 | EV-1: Retrieve vent tool, PM stowage bags; move to ESP-2.
02:50 PM | 04:15 | EV-2: Cleanup S1 tethers; couple CETA carts.
03:20 PM | 04:45 | EV-1: Remove SSRMS foot restraint; install on ESP-2.
03:50 PM | 05:15 | EV-1: Install J612 extension cable between A/L & Node 1 for PMM.
03:50 PM | 05:15 | EV-2: J612 extension cable install.
04:35 PM | 06:00 | Cleanup/airlock ingress.
05:00 PM | 06:25 | Airlock pre-pressurization.

---------- Post added at 01:50 PM ---------- Previous post was at 01:17 PM ----------

The new PM is installed! :speakcool:

Now they're bolting it down, then they'll connect it up! :thumbup:

 

[SiberianTiger]

What a fusspot birthday she must have this time! :shifty: I just like this lady, and respect her deeply!

 

[Orbinaut Pete]

What a fusspot birthday she must have this time! :shifty: I just like this lady, and respect her deeply!

I'm sure the best present she could get is seeing all her hard work pay off with the Loop A ETCS working again!

---------- Post added at 02:04 PM ---------- Previous post was at 01:59 PM ----------

All 4 bolts on the new PM are engaged, and all 5 electrical connections are made! The new PM shows "good pressure"! :woohoo:

Next is the "bump test", where MCC-H will briefly power the PM's motor on! Let's hope the RPCM doesn't trip again! Tense moment...

---------- Post added at 02:23 PM ---------- Previous post was at 02:04 PM ----------

Bump test successful!

"We have a healthy Pump Module in the S1 Truss of the ISS"!

GO to mate fluid QDs!

:woohoo: :hotcool:

---------- Post added at 03:15 PM ---------- Previous post was at 02:23 PM ----------

Fluid line QD M4 now mated.

Spaceflight Now: "Spare ammonia pump installed into station truss".

Florida Today's "The Flame Trench" Blog: "'Sweet' news on station: spare coolant pump is healthy".

---------- Post added at 04:04 PM ---------- Previous post was at 03:15 PM ----------

All 4 fluid line QDs are mated and all valves have been opened. PM work is now wrapping up.

And that gentlemen, is how we do that!

Congrats to the amazing work by the ground teams and on-orbit crew!

Now, let's get that old PM down *ahem*135*ahem*! :thumbup:

 

[N_Molson]

Tracy & Douglas did perfect job ! And no doubt that they are now amongst the best EVA repair specialists :thumbup:

 

[Orbinaut Pete]

Spaceflight Now: "Coolant lines connected to replacement pump".

SPACE.com: "Success In Orbit: Astronauts Replace Vital Space Station Cooling Pump".

Florida Today's "The Flame Trench" Blog: "'Game over' as spacewalkers finish pump installation".

Florida Today's "The Flame Trench" Blog: "Spacewalk wrapping up; not enough time for shuttle-related task".

 

[astrosammy]

Two EVAs before and some after the birthday... That must be a great thing. And has there ever been someone who had four (or even more) EVAs on his (or her, in this case) first spaceflight with EVAs?

And, will the two continue to do all the EVAs? I know, Doug and Tracy are a great team and do a great job, but there has never been a women-only spacewalk before and with Tracy and Shannon this would be a great first.

I also want to thank all who cover the spacewalks here as I didn't have the time to watch this spacewalk.

:thumbup: