Originally Posted by LarryJ

They have started to activate Ch.9 on the 737s with AVOD. Each airplane has to be modified to get the audio directly from the #1 communications radio and that is done separately from the United Next conversion. I don't know how many are active, or how quickly they are being activated, but I did fly my first 737 with Ch.9 this weekend. It was an older (middle-aged) 737-800. The only way we can tell that it is active is the absence of the [INOP] sticker on the Ch.9 switch.