>>3799601Jesus, okay, "f/8 and be there" is a hell of a lot better than "f/22 at ISO 100 and be there", at least.
A small aperture (i.e., large f/stop like f/22) means not a lot of light is getting into your lens. To compensate for the lack of light from your lens, the camera needs to lower the shutter speed to expose your sensor for longer, or increase the sensitivity of your sensor.
The fact that your ISO is at 100 even though your shutter is all the way down at 1/40th suggests that you've got it set manually instead of using auto-ISO to let it float. Modern cameras are pretty good even at high ISOs, so I'd recommend letting it do auto-ISO. Then, open your aperture the hell up. f/8 would actually be a really good place to go with that lens--its maximum is f/5.6 at the long end, and you'll usually get a bit better quality stopped down a little, so f/8 is good. f/22 is something that you should almost never be using; that's probably about as small as your aperture gets, unless it'll also do f/32.
So,
>>3800910 has some okay advice. Maybe also try auto ISO and aperture priority but with a much wider aperture like f/8 or f/5.6--in bright sunlight, that should still give you a fast enough shutter speed to catch a plane, but going with shutter-priority like he suggested will guarantee it and requires you to know less.