On the 747 shot the main problem I see is that it is very soft - needs application of Unsharp Mask. Also the aircraft is not well centered in the frame - it is too low. Depending on the original shot you may be able to fix this with a better crop. There are several dust spots visible (although fairly faint). These can be seen clearly if you equalize the shot. The highlight on the front fuselage is perhaps a bit distracting but I think it would not be a major problem.
The A330 shot is sharper but could still do with a touch more USM
in my opinion. However this shot is rather dark and needs adjustment to brightness and contrast. If you are using Photoshop this can be done very simply with a levels adjustment. You also need to crop in a lot closer around the aircraft as there is presently too much sky in the shot all round. This should not be a problem provided the original is big enough and of high enough resolution. Again there are several dust spots one of which is very obvious even without equalizing the shot.
I think both shots have potential provided the original files are of good enough resolution.
I would strongly recommend you look at Fergul's workflow which is linked from the photo upload page and I also, personally, like this one as well :
Hope this is of some help.
All the best & good luck.
One thorn of experience is worth a whole wilderness of warning.