Certification & new orders from big American Airlines.......Bombardier's requirement for success with the C-Series is very simple: for now we need to see at least one new large order from one of the big American Airlines - it would be a big vote of confidence and would certainly help to give the whole C-Series project the additional credibility required to make it a big long term success.
The current rumor of United may be waiting for certification to announce an order would be amazing but, I certainly don't see this "as a done deal" yet......
i.e. Although I do have a lot more confidence in the potential success of the C-Series now that near term liquidy has been largely resolved, should a United order be announced before Christmas, I will again beleive in Santa Claus!!!!!!