While taking acceptance review TFs over the last 2 days, I noticed that the SR2 Pitch TF does not look healthy when the IFO alignment bias is enabled.  (Note, acceptance TFs are usually taken with all bias offsets disabled.)  

Likely the large pitch bias plus the TF excitation is causing an earthquake stop to brush the suspension somewhere.  The first attachment is the Pitch TF taken with the full IFO requested bias enabled (P=2789, Y=759), the second attachment is with a lower Pitch bias but the same Yaw bias (P=2589, Y=759).  This could be be headache for commissioners.  I mapped out that for reduced Pitch bias between ~1500 and ~2600 the TF looks healthy.  I did not map out exactly where between ~2600-2789 it goes bad.  Indeed, the TF at the aligned state looks to have both Pitch and Yaw motion when viewed on the AS Air camera.  The bad TF seems to happen when the beam is somewhere off the top of the camera view.  Probably too close for comfort.