I heard the contract was allowed to expire and DL
made the decision to not renew it due to the fact that the design was encountering what were then being described as 'significant certification issues.' Most folks concluded that this meant the FAA said they would not certify the design as presented. Makes sense if you stop to consider the fact that the company that launched the design is no longer actively promoting it.
[Edited 2012-02-11 08:54:44]
From First to Worst: The history of Airliners.net.
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