Reports until 09:51, Thursday 19 November 2015
H1 General
patrick.thomas@LIGO.ORG - posted 09:51, Thursday 19 November 2015 - last comment - 09:55, Thursday 19 November 2015(23559)
Lock loss 
SUS SR2 saturating 17:48:35 UTC
Comments related to this report
patrick.thomas@LIGO.ORG - 09:55, Thursday 19 November 2015 (23561)
Link 

Keita says that the powering down of the RF AM monitor broke the lock.