Originally Posted by
ANCDU
Although I’m not aware of Jetstar SOP, this is often an SOP brought about as a signal to the ground grew that the aircraft is about to commence moving under its own power. ( a beacon doesn’t signal this) It’s usually for the safety of ground crew and to mitigates a risk if the dispatcher/ engineer is inadvertently left connected.
This!
It has saved me from being run over more than once. Even while still plugged in. 😳