Good analogy Shadow... I now have quite a lot of useful angles and explanations to put to her. She is a very bright young lady and I'm sure will have no problem relating the explanations to events/sounds. Just got to find the time to get it all set out into a few sessions and make a start. After 'ground school' I plan a visit or two to CDG for viewing take off + landings. I feel also that the large airport scene is unnerving her so will probably fly from Beauvais for the final part.
Thanks to all for the help.