As described in Work Permit #3425, we replaced the "One Stop" PCIe Fiber Link cards in the "aLIGO I/O Expansion Chassis" connected to the H1 and H2 front-end computers.  This was to correct for a manufacturer's incompatibility with fiber optic cable sets.  The following I/O Chassis had their cards exchanged:

Location    computer    Chassis s/n
EY            h2susauxb6      S1103366
                h2susb6              S1001132
                h2tcsey                S1102673
                h2pemey             S1001138
                h2seib6               S1102608

LVEA      h2tcsIO                 S1102672
                h2susb478         S1001136
                h2susb78           S1001137
                h2susauxb478   S1103368
                h2seib8               S1001135

H1Elect    h1susaux34       S1104995
                h1sush34              S1103886
                h1h1susauxh2    S1103622
                h1sush2a             S1103890
                h1sush2b             S1103885
                h1psl0                   S1200685