Originally Posted by
StuMcIlwain
AC456 is an A319, and at that time of day, there's really nowhere else that plane can go except back to Toronto as AC461. However, if you encounter severe flight disruptions (such as thunderstorms at YYZ), planes can get swapped around at short notice (for example, if AC456 is hours late and they have another aircraft and a crew at YOW -- perhaps from an earlier YYZ flight that was also delayed).
Not entirely true, if something happened to AC189 (inbound from LHR as AC189) the 319 could very well be called in to operate it...
Thats the thing of coming to and Embraer base; we see very few 319/320's (all to YYZ or YVR) so there are usually never any sitting at the gates.
And in my example above, a downgrade from a 767 to a 319 would be hard (but not impossible); a downgrade to a E90 will not happen.
You should be fine, but there is always a chance
For what its worth, 889 has an excellent track record.