Please stop this madness about CS300 at LCY. It is not going to happen.
How about saving comments like this and leaving space of ones useful to the discussion in hand - if Bombardier/Airbus have mentioned certification, and well versed posters see it as a possibility allow it to be discussed. Unless you're the FAA or Airbus CEO you know really nothing for certain....
According some news (if I remember correctly as part of the Jan/Feb-2019 Airbus North America tour with 50 reporters through all Airbus facilities in USA and Canada (including the start of building of the A220 FAL in Mobile and A220 facilities in Montreal)), it was mentioned, that Bombardier technicians have already worked for prolonged time on PIPs for the A220 family, but these will now not be implemented (only later on).
Airbus is not stupid, they are highly experienced and they know, what they do.
1. Get the A220 massproduce ready (just verify "Fliegerfaust", he has two, which describes nicely, what Airbus is now doing in Montreal FAL.)
2. Ramp up the production
3. Together with the vendors, reduce the production costs.
Only two PIPs have been already implemented on request by airlines:
1. ETOPS 180 by KAL
2. MTOW increase 2020/2021 (A220-300/A220-100) on request by several airlines. (with exception of KAL, which were not interested).
Less or more nothing is known regarding PIP in developement by Bombardier techicians.
What is known:
1. two additional seats/PAX per plane and this is confirmed, because it was the request by Airbus and they have noted it.
2. aerodynamic refinements, this is also confirmed that they are working on these, but not confirmed which one. It was discussed/expected change of position of sensors, sligth smoothing of the surface, closing of the wheel houses e.g.
And why I am writing this whole story:
3. Upgrade of the breaking system for the A220-300.
By bad luck, I do not any more find all of these links, there were several one describing the planned PIP.
one of these:https://leehamnews.com/2019/01/17/pips-planned-for-a220-to-improve-operating-costs/