I tried using Arduplane firmware version 4.3.0 and 4.4.0 but there was no pwm output when the throttle was set in servo output. When I tried using firmware version 4.2.0 there was pwm output in servo output.
I tried using Cube Orange it works fine for all this firmware. This problem persists only in CUAV X7 PRO. Hope this problem can be solved soon. Thanks.