If it's for a commercial company, you should ALWAYS charge something. They are using the photo as part of their business and will therefore be profiting from it (they won't be producing something for free). Any contributor, no matter how small, is entitled to a share. It's entirely up to the individual whether they charge or not, but it doesn't help anyone else if they don't as companies become to expect free photos.
Unless it's a rare photo, it probably won't demand much in the way of a fee. It also depends on the circulation. Everyone will have a different opinion on what the charge should be, my minimum charge is $30 for common aircraft on low circulation to several hundred for rare aircraft and large prints / circulation. Why not ask them to make you an offer, they may be on a budget or offer more than you had in mind? The offer doesn't always have to be financial. If they have a hangar, a tour of their hangar might be a fair deal?
Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX