Based on the above, it looks like we're due compensation unless AC can claim extraordinary circumstances for the cancelled and delayed flights..going back to my original post, can anyone answer these questions?

2. We don't know for sure the cause of the cancellation of 7554 and delay of 2076. We suspect 7554 was cancelled due to an extremely light load but don't know for sure. We also assume that 2076 was delayed because of catering and mechanical issues. How can we determine the "official" cause of the cancellation and delay and obtain flight details like shown above?

3. Assuming there are grounds for compensation, can I submit a claim for all the parties? or would they have to claim individually.

4. If I submit claim, can I do it for all four PNR's or do I need to submit separate claims.

5. Where and how should the claim be sent? Mail? email?

6. Is there a specific form to file claim, or just an explanation?