At around 14:30 LT  the EIB control actuator (ACT5) went out of range without any apparent reason. Attempts to open and close the EIB loops were unsuccessful.

I went to the LL and checked/rearranged the water tubes, which are a known weak point and a common cause of EIB going out of range. Although I was able to bring the TY closer to its nominal position, the loop still could not be closed.

I then contacted Henk Jan, and we remotely adjusted some microsprings to bring the EIB back towards its nominal position. This was not sufficient, however, as the microsprings were approaching their maximum dynamic range.

The current solution is therefore to adjust the weights on the bench to bring the EIB closer to its nominal position and allow the loops to be closed. However, this action is very time consuming and we decided to postpone it to Monday morning since the ITF is not needed during the weekend. Therefore, I left the system in safe mode: all the loops opened (BPC, AA, RFC), put the PMC in scan and blocked the beam on the output of Laser Bench.