The hearing, which I listened to, made clear he announced that the train would be holding AND that he had to change ends. But, there were then no further announcements from the operator as he traveled from one end to another. Because of how crowded the train was (two sporting events had recently ended), and the length of the train, it took him 11 minutes to get from one end to another. So people were calling on the emergency intercom and getting no response, but that was because the operator was en route from one end to another.
Living in Broadlands, VA; Working at Half & L SE, DC.