An attempt was made to swap the split whitening chassis that is currently used for the ASC-AS_C QPD (serial S1101627 in slot U26) with a standard whitening chassis. The current chassis is a split whitening chassis that needs to be modified back to a standard whitening chassis in support of BHD/JAC. While swapping the chassis, I noticed that cable ISC_445 was connected to old OMC PD inputs. I seem to have forgotten that one of these channels is now used for the OMC-REFL PD. The new whitening chassis cannot accommodate this without a new custom cable, so the changes were reverted. However, the new standard whitening chassis, serial S2101199, is now mounted in slot U26, whereas the split whitening has moved to slot U29.