Kalle,
Yes. Like I noted, a ball that passes over a pylon is pretty well guaranteed to have broken the plane of the goal line (between the sidelines). But, if we can clearly see the ball cross over the sideline without passing over the pylon, and the BC is airborne, that won’t score a TD, even if the ball is beyond the goal line extended when it becomes dead, because the goal line does not extend beyond the sidelines for airborne BCs.
Honestly, in the purest sense of the rules as they are written, the AR is in conflict with the rules. Since the pylon is totally outside the sideline, a ball that passes ONLY over the pylon, with no part passing through the plane of the goal line - which stops at the inner edge of the pylon for an airborne BC - technically, should NOT be a TD. But, the simple size of a football, as compared to a pylon, pretty well assures us that a ball that passes over a pylon most likely also passed through the plane of the goal line. And it is going to be very hard to tell if the ball passed ONLY over the pylon, without, technically, breaking the plane of the goal line. If a BC can get the ball over the pylon, let’s give him the TD. And that’s what the AR says.
Robert