It's not just the MX reliability. The Q400 has been available for sale since 2000. Out of a total production of 383 aircraft (including all the military models) I think there are less than 60 flying in the US, and Bombardier only plans to deliver 28 worldwide this year. Their production backlog is just 29 airplanes. Compared to CRJ sales during the same period the Q has not been popular with Bombardier's customers. PCL says the Q400 contract is the worst financial performer in their portfolio.

It's my opinion that we need additional scope language covering aircraft in this class with "nextgen" powerplants.