You would find it would be simple airframe and seal testing or orientation flight, get free airspace and they use it, some examples even occurred with the RAAF Caribou years back out of Wigram.
Now if they could just bring an AC-130 they could sort out Auckland's traffic problem...
Founder and Former CEO of VANZ
"You land a million planes safely, then you have one little mid-air and you never hear the end of it." Air Traffic Controller, New York TRACON Westbury, L.I