DRIFTED CLOSED????!!?? I (and several others, lol)would have somebodies butt for that one. What good is a self closing air gap? Our switchrack disconnects ALL have padlocks on them, both in the open and closed positions, if they changed positions accidentally then there has been a serious failure.
And hanging grounds requires everyone involved to be notified.
It sounds like there were two seperate work authorities issued here and there was no proper written procedures. Even in cases (or perhaps especially) of abnormal conditions we take the time write up a procedure and review it with all parties.
I am thankful the agency I work for does not engage in russian roulette switching like that.
Again thank goodness you and all others are safe and whole.