Bloggs, you beat me to it. Then again, if said situation had happend and the guys had used the truck to get to the ground to pre-flight, I'm sure some managment nong would then rake them over the coals for it being an OHS risk... which, I guess it is, but in exceptional circumstances...
Besides, I'm sure there's a ladder somewhere at Tindal... if it's good enough for engos it's good enough for a pilot!!!
