Has a pump module been replaced before? Does anyone know if there is a published EVA checklist for replacement of the the pump module?
Quote from: arkaska on 08/01/2010 09:46 amOne of two ammonia-fed cooling loops on the International Space Station shut down at 8 p.m. EST Saturday nightThanks for the update, but I'm pretty sure you are off by an hour (we use Daylight Saving Time in the US.) It was around 8pm EDT / 00 UTC.Sounds like the retest of the pump is what woke up the crew early, as it triggered some alarms that the ground did not expect. Fairly quiet otherwise, private family conference going on as scheduled this morning.I'm not sure what the issue with the audio archive server would be (I just provided the files.) I am saving them locally and will upload elsewhere later today.
One of two ammonia-fed cooling loops on the International Space Station shut down at 8 p.m. EST Saturday night
What I meant was, is there a long-term solution to this in the plans of any of the current or future (ATV/HTV/OSC/SpaceX, not including any future NASA HLV) providers of services to the ISS?
NASA announced that both spacewalkers had blue stripes. But according to these pictures from Roskosmos, this is not true. Yurtchikhin's Orlan-MK n°4 had blue stripes, Kornienko's Orlan-MK n°6 had red stripes
Payload Milestone:An important milestone was completed today when 12 utilization racks were active at one time. Over the course of the day a combination of 12 of the following 13 payload racks were active and conducting or preparing to conduct weekly science operations: ER-1 (ExPrESS Rack-1), ER-2, ER-3, ER-4, ER-6, CIR (Combustion Integration Rack), FIR (Fluids Integrated Rack), MSG (Microgravity Science Glovebox), MELFI-1, MELFI-2, MELFI-3, SAIBO and RYUTAI.
Wondering if it is connected with that circuit short during saturday evening...
Quote from: Space Pete on 07/30/2010 03:07 pmPayload Milestone:An important milestone was completed today when 12 utilization racks were active at one time. Over the course of the day a combination of 12 of the following 13 payload racks were active and conducting or preparing to conduct weekly science operations: ER-1 (ExPrESS Rack-1), ER-2, ER-3, ER-4, ER-6, CIR (Combustion Integration Rack), FIR (Fluids Integrated Rack), MSG (Microgravity Science Glovebox), MELFI-1, MELFI-2, MELFI-3, SAIBO and RYUTAI.Wondering if it is connected with that circuit short during saturday evening...
HL-42 of course.
• Could the RPCM have failed, taking with it the current limiting function? If this was the case, the PM might actually be in 100% working order, and the RPCM needs to be replaced?
Some days training seems more real than others on E26. Today in the pool I'll practice the spacewalk for the pump module changeout for E24.
Analysis, Spacewalk Preparations Continue After Loss of Cooling LoopTeams of flight controllers are continuing engineering analysis and refining spacewalk procedures to replace a failed International Space Station ammonia pump module later this week. Expedition 24 astronauts Doug Wheelock and Tracy Caldwell Dyson currently are scheduled to start the repairs on the station’s starboard truss Thursday.A briefing to discuss the current station status and to preview the upcoming spacewalks will be broadcast on NASA Television at 4 p.m. EDT today. Briefers will include Michael Suffredini, the International Space Station Program Manager, and Flight Director Courtenay McMillan, who will lead the team supporting the spacewalks.The pump failed Saturday night after a spike in electrical current tripped a circuit breaker. When the 780-pound pump failed, it shut down half of the station’s cooling system. Efforts to restart the pump, which feeds ammonia coolant into the cooling loops to maintain the proper temperature for the station’s electrical systems and avionics, were not successful. The station’s crew worked with Mission Control to put the station in a stable configuration. The crew, which is in no danger, has resumed normal work activities. A tag-up to review procedures with spacewalk specialists is planned later today.Mission Control also is preparing procedures for venting excess ammonia from the failed pump Tuesday in preparation for its removal. On Wednesday, flight controllers plan to move the Mobile Transporter, which will be used to support robotics operations for the spacewalks, into position at the replacement worksite.Current planning continues to support an initial spacewalk on Thursday beginning just before 7 a.m. by Wheelock and Caldwell Dyson to unbolt and remove the failed pump module, and to install the spare. NASA TV coverage will begin at 6 a.m. A second spacewalk to hook up a variety of electrical and fluid connections for the new pump module could occur two or three days after the first spacewalk.Wheelock, who will be designated as EV1, or extravehicular crew member 1, wearing the spacesuit bearing the red stripes, will be making the fourth spacewalk of his career, while Caldwell Dyson, designated as EV2, wearing the unmarked spacesuit, will be making her first spacewalk.
Cady Coleman is going to be rehearsing PM R&R procedures in the NBL today.
Quote from: Space Pete on 08/02/2010 02:39 pmCady Coleman is going to be rehearsing PM R&R procedures in the NBL today.I'd lay good odds we'll have some nice video in today's ISS hour?
I was thinking that maybe rehearsing "critical" EVAs (like PM, ATA & NTA R&Rs) should be a requirement for all future ISS crews in future? Maybe every ISS crew should have designated "Contingency EV Crewmembers"?