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