Crew: Mark L., Mick, Carolyn
Mark and Mick prepared tooling ("5 of 6" and "4 of 6")and then ran start of the day checks. John W. came out at my invitation and 'bunnied-up" to go into BSC-7 to assess the quality of the brushing so far and give us some idea of "good enough". John is generally satisfied with the cleaning, agrees that the round brush gives a smoother finish, and thinks that the sections cleaned with the cup brush are probably OK as-is. Mick took an FTIR at section M-9 and then Mark started cleaning that section. Two minutes into the run, "5 of 6" seized due to a small bearing failure. (Fortunately, extra bearings and end plates arrived Friday!)"4 of 6" was then put to work.  Mark took pix of the iLIGO dust barrier for Bubba. The brushing of the three remaining mid-section areas was completed with "4 of 6". The guys also hand-worked various areas that the air drill cannot reach (close to the support tubes and fins). Dome and door covers were replaced and end of day checks run. Mark and Mick spent time late this afternoon dis-assembling and cleaning new drills and bearings.