I just received and installed the 3DR on my quad, but the air module is giving me fits. The green lite is on steady whenever there is power, even if the ground unit is not active. I have the usb port disconnected on the apm2.5 so that isn't the problem. Also the a and c lites on the apm2.5 quit normal operation with the air radio hooked up. I don't have an ftdi to usb cable yet to try to hook it up to the computer, but is there anything anyone has seen that will correct this issue without hooking up to the computer? The ground unit seems to work fine and has a flashing green lite and I upload the settings. Any info would be greatly appreciated.