Indications are, it is TWO Gulfstreams - and the conversions won't be completed until the end of November 2017.
G550 contract suggests new Australian surveillance aircraft
Then - we find, we also have that wonderful Dept of Defence term, couched in the deal - "Undefinitized Contract".
What this means of course, is that we've handed over US$93M just to gut the interior - and the final bill could be $193M or $293M or $393M - depending on just how many invoices can be inflated to ballistic levels, to ensure the contractor can make ends meet - after all those corporate golf games times, and 50 new company Cadillacs are tacked onto the final invoice as "miscellaneous items".
Definition of Undefinitized Contract