About 20 min from start to finish.
Looks pretty good, reminds me of some of my flights.
Put some motion blur on the prop to add a touch of realism, unless it's feathered.
Added some motion blur to the propeller.
Nice job.
I think a few of the components on the bottom of the plane look too plain, like the wheel/tire for example is just flat and looks drawn on. Also, take a look at some airplane pictures, you should be getting some reflection off of the ocean causing a blue tint to the bottom of the airplane.