NASA Space Station On-Orbit Status 29 April 2005
"Update on Elektron: After yesterday's two unsuccessful tries at restarting the Elektron O2 generator (one before, one after an effort by Krikalev to repair a leak in the nitrogen feed hose), ground specialists are considering plans to replace the currently installed BZh-7 (Liquid Unit #7) with the spare (but used) BZh-6 in the near future (BZh-6 was checked out for functionality by Sharipov on 4/7-8). As of last night, the pressure onboard the ISS was within Flight Rule limits, and specialists believe another O2 repress from 17 Progress tanks may be necessary over the weekend ahead."

