There is much reported on the CSeries order by Canada’s Porter Airlines.  Canada’s Globe and Mail reports the airline is going to order 12 CS100s and option 18 more. The news is bringing up a lot of debate of how the airline will be able to use these airplanes out of their downtown Toronto airport (YTZ).  This airport has a storied history.

The back story here is the same as it is for every downtown airport – noise.  Airports are noisy and neighbors don’t like it.  Toronto has a “Tripartite Agreement” which does not set a maximum number of flights or passengers at the Island Airport; but it does establish noise exposure parameters which are not to be exceeded (NEF 25). The Tripartite Agreement was created in 1983 between the City of Toronto, the Toronto Harbour Commission and the Government of Canada covering operation of YTZ and is in force until 2033.  The agreement restricts jet traffic to MEDEVAC flights.

Consequently does this mean the Porter decision is going to reflect a change in its operations?  We expect to see Porter, Bombardier and P&W all point to the low noise footprint of the CS100.  Indeed we have seen noise samples showing the CS to have the same noise footprint as the Q400.  But we doubt this will satisfy the  neighbors. If the noise footprint is the same, the airline might still have other challenges such as obstacles and a steep glide slope. These issues are common at all downtown airports where cities have grown up around the runways.

Bombardier has repeatedly said its LoI customers do not want to telegraph their CS decision so that competitors cannot react in advance.  Porter’s decision certainly seems to be that way.  When the formal announcement comes the rationale and explanations are bound to be interesting.

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