STS-122: Post ECO Issue Troubleshooting/Pre Launch Flow Latest

• #200 by psloss on 18 Dec, 2007 14:36
• Backup pump is online already; should be getting to stable replenish on the LO2 side soon...
• #201 by psloss on 18 Dec, 2007 14:38
• Now in stable replenish on both sides (controlled switching).  The red teams will be headed to the pad shortly.
• #202 by Chris Bergin on 18 Dec, 2007 14:49
• They've arrived...

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• #203 by Chris Bergin on 18 Dec, 2007 14:53
• And up in the elevator.
  
  "*Bing* Menswear"

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• #204 by Chris Bergin on 18 Dec, 2007 15:00

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• #205 by Chris Bergin on 18 Dec, 2007 15:08

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• #206 by Chris Bergin on 18 Dec, 2007 15:09
• Live from TDR HQ:

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• #207 by Chris Bergin on 18 Dec, 2007 15:13
• Voltage readings confirm console readouts on the health of the four sensors/circuits.
• #208 by Chris Bergin on 18 Dec, 2007 15:17
• TDR Engineer's laptop keeps freezing, I've noticed. Has had to reboot it twice already.

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• #209 by Chris Bergin on 18 Dec, 2007 15:21
• Quote

  pad rat - 18/12/2007  4:17 PM
  
  With all eyes on the ECO sensor troubleshooting, has anyone seen/commented on this little gem?
  
  http://www.kvue.com/news/top/stories/121707kvueshuttlewings-mm.27bc4fe1.html
  
  Seems the AA batteries that drive the transmitter for the leading edge impact sensors are dead and can't be replaced without rollback. Brilliant piece of systems engineering, that. So now, no doubt, SSP will craft some feel-good rationale for flying without the sensors.

  
  Old news.
  
  http://www.nasaspaceflight.com/content/?cid=5299
  
  And they have good rationale.
• #210 by triddirt on 18 Dec, 2007 15:21
• Quote

  Chris Bergin - 18/12/2007  11:17 AM
  
  TDR Engineer's laptop keeps freezing, I've noticed. Has had to reboot it twice already.

  "Keeps Freezing" No pun intended I'm sure  :cool:
• #211 by Chris Bergin on 18 Dec, 2007 15:29
• Quote

  triddirt - 18/12/2007  4:21 PM
  
  

  Quote

  Chris Bergin - 18/12/2007  11:17 AM
  
  TDR Engineer's laptop keeps freezing, I've noticed. Has had to reboot it twice already.

  "Keeps Freezing" No pun intended I'm sure  :cool:

  
  I'm available for children's parties and office functions. Plenty more cryo related puns in my back pocket
  
  
  TDR checks on sensor 1 and 2. Any body lanuage readers on here (I am not being serious!)

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• #212 by Chris Bergin on 18 Dec, 2007 15:31
• And now reading data from LH2 ECO sensor #3
• #213 by Chris Bergin on 18 Dec, 2007 15:34
• Maybe they've found something! (Guessing)

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• #214 by Chris Bergin on 18 Dec, 2007 15:41
• And now TDR'ing LH2 ECO #4....and through to the five percent sensors.
• #215 by Chris Bergin on 18 Dec, 2007 15:52
• Inspection team at MLP level now.

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• #216 by Chris Bergin on 18 Dec, 2007 16:00
• TDR testing phase 1 complete on all LH2 ECO sensors (low level/5 percent).
• #217 by Chris Bergin on 18 Dec, 2007 16:13
• TDR Troubleshooting (manually inside the MLP) is complete.
• #218 by Chris Bergin on 18 Dec, 2007 16:14
• TDR team now leaving the MLP. TDR will remain active, as console operators will watch the sensors during detanking.

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• #219 by Chris Bergin on 18 Dec, 2007 16:24
• L2 sources note initial TDR data point to the problem being with the LH2 Feedthrough Connector.
  
  This - at this stage - would confirm the engineering thought process on this prior to the tanking test:
  http://www.nasaspaceflight.com/content/?cid=5309
  
  This could get interesting, as extensive MSFC testing, gained via presentation slides on L2 yesterday, showed they could not find a problem with the connector during lab testing.