The annulus pressure in HAM 11,12 (diagonal volume) is rising and causing the both AIPs to fall out of range. Both AIPs were replaced in May 2016. Today I leak checked all door and flange outer o-rings on HAM 11, 12, and also AIP conflat flanges. Found e-5 Torr-L/s of He range leak at bottom of HAM 11 south door and e-7 Torr-L/s of He range leak on HAM 12 south door. Kyle tightened bolts but flanges were already metal on metal. Suspect there is an imperfection on outer o-ring seal. Will address next time we have the opportunity to vent (or decommission) the diagonal volume. 

FRS 8411