Are we talking Net present value or Discounted Cash flow for our thumb nail evaluation of solvency.
What sensitivity analysis has been applied to check the assumption validity.
Are the assumptions based on positive goal congruence or negative goal congruence an in each case what are the permissable variance values.
Accounting in an organisation as large as Ansett is a complex and very highly controlled business, to make assumptions based on "street talk" of variations in so called liquidity is to be so superficial as to be nothing more than over the back fence gossip.
if you really want to understand Ansett get Air N.Z. last annual report and conduct some proper ratio analysis on the results, it is a public document.