u/soberbitch823

I checked in for my flight from Scotland to Amsterdam the minute after checkin opened so I had my seat and boarding pass for more than a day already.

This morning I woke up to an email stating that I have received a voucher and an automatic rebooking with the reasoning of “involuntary denial of boarding.” I go to the airport and lo and behold KLM decided to send a smaller plane than the one originally promised.

I just need help understanding how this is allowed.

Edit: I did not know that it was because of defective planes and only found out about the defective planes 5 hours after the cancellation occurred.