I forgot about Jenne's note about changing AS_A_36 phase.  So I have done that, but it didn't address the ALSy issue.

Trending oplevs for ETMy & ITMy does show some big alignment changes.  I still wonder if this is related to a WFS issue.  Will steer optics back to see what this does.  

NOTE:  I have not seen this issue before with a Y-arm misalignment like this!

Ed's here to save the day, but I'm trying to remember what I saw & did with ALSy.

Definitely saw ITMy & ETMy both shift their alignment!  (see attached to see ITMy/ETMy pit/yaw shifts & various things I did to bring  back).

Back Story:  

• Lockloss after 42-hr lock.
• For relocking, immediately saw Green Y was in la la land
  • No light on ALSy video!  AND ALS-C_TRY_A_LF_OUT was dead flat at zero!  So there was no flashing in the arm!
  • Issues on ALS Y Overview
    • Green WFS spots were visibly off 
    • CAM ITM PIT Error signal was way above -0.2 (it was -1.2!).  On Jenne's old trouble-shooting document, it send to hit to hit Clear History button on the ALS Y Overview screen (but this button no longer seems to work....the clear history command/script/file is no longer in there)
  • Trended ETMy & ITMy and they shifted alot after the lockloss!
    • Because of ALS Y Overview issues due to WFS noted above, I was worried the issue was there, but since I couldn't fix anything with that, I started with moving optics.
  • Moved ETMy & ITMy back to pointing during the lock.  This finally gave baby flashes for ALS TRY.  
    • Oh!  Around this point is where I remembered to run the command Jenne alogged about on Thurs!
  • Walked ETMy, ITMy, & TMSy (by alot!) over several iterations.  Eventually had flashes over 1.0. 
  • Locked up ALS-Y (and finally gave ALSx attention).
  • Tried locking, but "IR was not found"
    • Ed came in and he found IR, but PRMI flashes looked UGLY!  He is now running an INITIAL ALIGNMENT.

Wanted to also mention that I clicked on the "Clear History" for each of the individual Filter Banks on the  ALS Y Overview (which I assume the non-functioning yellow Clear History button would do on this medm window).  When I did this I did not notice any change to the CAM ITM PIT Error signal.  These filter banks had their inputs OFF and their outputs were zero.  Just wanted to note that I did click their Clear Histories though.