Reports until 11:40, Tuesday 26 June 2012
LHO VE
kyle.ryan@LIGO.ORG - posted 11:40, Tuesday 26 June 2012 - last comment - 11:48, Tuesday 26 June 2012(3266)
Leak from HAM3-BSC2 septum annulus redemonstrated
Both the inner and outer annulus O-rings which are integral to the HAM3-BSC2 septum itself (BSC2 side) were shown to leak previously.  These leaks were re-checked following the most recent venting of the input MC volume and found to have been unchanged by the change in load across the septum.  This 2nd test was not documented and some doubt as to whether or not the bellows tie-rods had been relaxed prior to this 2nd test arose as they were discovered to be in tension when Apollo began to remove this septum plate for inspection yesterday -> So, today I rechecked the outer O-ring and demonstrated that it still leaks and can confirm that the bellows tie-rods are now loose.  As such, the septum will need to be removed for inspection/repair.
Comments related to this report
john.worden@LIGO.ORG - 11:48, Tuesday 26 June 2012 (3267)

The outer leak appears to be located on the BSC side of the septum plate and near 7:00 (bottom left)  looking towards HAM1.