Building planes is engineering, not science. 
Science is about understanding things, not about making them work.

Engineering is about making things work, not about understanding them.

Indeed, most of the science engineering use is grossly inaccurate or just plain wrong - no scientist would touch it with a barge pole, but engineers still use it, because it's close enough to make stuff work.

Conflating the two will not get you accurate conclusions about anything.
No scientist will ever claim to have the absolute final answer to anything, and even what they are certain off, they continue to further research, believing there are even deeper truths waiting to be found. 
But for an engineer - either the plane flies or it doesn't, either the bridge stands or it collapses. It's a completely different standard. The scientist is happy if we understand better than before. The Engineer is happy if the bridge stays up.