Randy, Sheila, Betsy, Kar Meng, Camilla

After Sheila and Kar Meng found an issue with FC QPD A segment 3 88991, and after discussion with Ali James, Sheila went into chamber to test it.

Started with flashlight to confirm A vs B. Then after unplugging QPDs at SQZ rack, Sheila removed the diode detector holder D2000384 from the enclosure D2000246 (marked part #4). Once the cables were plugged back in at the rack, the signals on segments 1, 2, and 4 fell to zero but the segment 3 signal stayed railed at +30. This shows the issue is most likely inside the sealed enclosure, which is not a trivial fix. We attempted to swap the in-vac cables on the diodes to be sure the issue isn't in the in-vac cables or feed-through the cable was hard to removed so we stopped. Finished with a flashlight test again.

After consulting Safety on the technique, we employed a plank on the stationary fork lift to add an extra seating-perch in order to reach and troubleshoot the issue.  Photo attached of Sheila "surfing".