It was my understanding that all/most/all-controllable radios were shutoff at some point. There was some maintenance data from the engines that factored into th

It was my understanding that all/most/all-controllable radios were shutoff at some point. There was some maintenance data from the engines that factored into the search location, but otherwise it wasn't transmitting anything. I havn't followed very closely, so take that with salt, but it's a starting place if anything.