Hi,
The only thing I can add is know the responses you made on the app form to the essay/open ended questions. In my interview they wanted to explore them in a little more detail.
Also, a few questions as I remember on CRM, the importance of it in todays commercial environment, SOP's, your understanding of why airlines use them, if and when they can be deviated from etc.
As previously mentioned, know the details on the airline, such as A/C operated, bases, route structure, future plans etc.
Best of luck.
Lookoutbelow