Doing some investegating....
OZjet's aircraft
OZD, OZX, OZU, VLH all owned by Heavy Lift, did a c/n for OBN on FAA and no records, (OBN c/n is 21137, apparently still sitting at Perth Airport minus a engine according to an informant.) That informant also said that "Cobham" have been doing chistmas island flights for Ozjet every tuesday for the past 3 weeks.
However I can't find anywhere on CASA website reg data, including the add and deletions any reference of VH-OBN, strange. The only thing that comes up when I do a C/n search is OBN reg to OZJET AIRLINES PTY LTD Locked Bag 6060, TULLAMARINE VIC 3043 eff 15/2/06. So explain that one?