Tag: IPR-47
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STS-133: Agency FRR approval for Nov. 1 launch date – SRB review
The Agency Flight Readiness Review (FRR) has concluded by approving November 1 as the launch date for STS-133. The decision came after a smooth review process, aided by the resolution of the OMS (Orbital Maneuvering System) crossfeed flange leak and the clearance of one “action item” from the Space Shuttle Program (SSP) FRR, relating to…
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STS-133: Crossfeed flange seal R&R complete – OMS reload in work
Engineers have completed the removal and replacement of the two seals on Discovery’s Right OMS (Orbital Maneuvering System) crossfeed flange on Saturday, after the eduction of the plumbing beat the schedule by over a day. Fuel reloading began at 6:30am local on Sunday, with Interim Problem Report (IPR-47) set to be removed in time to allow managers…
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STS-133: Engineers press forward with flange seal replacement
Engineers are continuing to work on IPR-47 (Interim Problem Report) – a leaky flange on Discovery’s crossfeed line plumbing – after a decision was taken to replace the two internal seals on the hardware. Earlier, torque checks found no issues with the system’s bolts, prior to the leak inadvertently ceasing via a pressure change in…
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STS-133: Discovery to undergo unique leak repair to avoid rollback
Discovery’s IPR-47 (Interim Problem Report) has become a potential schedule concern, after the replacement of a flight cap failed to stop a vapor leak in the orbiter’s aft. The leak is now believed to be in the crossfeed flange area, with the forward plan requiring the draining of the left and right Orbiter Maneuvering System…
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STS-133: TCDT completed – Engineers troubleshooting leaky flight cap
Another milestone was passed on Friday, after Discovery, along with her astronauts and controllers, successfully completed the Terminal Countdown Demonstration Test (TCDT). With the dress rehearsal completed, engineers are pushing forward with troubleshooting on a Air Half Coupling (AHC) flight cap, a Quick Disconnect (QD) which is leaking small amounts of hypergolic vapors. STS-133 Processing…