I only had a single flying related one in my application form, and only used one flying related one in the interview. BA want the examples to highlight and match the qualities they ask for on the website, so just select the ones which are closest to those.
Also, if you have a range of really good examples, keep your powder dry for the interview (i.e. keep the really juicy ones for day1), as you can't talk about the ones on your application form when you are at braincrank. You've got to have some different ones!