On the other side, in the movie "Memphis Bell" they had a set of advisor/editors to try to keep the movie real. Those guys were all pilots, most veterans.
One crash scene, they agreed was over the top, too much flames, too long to put it out, and unrealistic wild driving by the fire trucks. The pilots got out, and stood around and watched it burn.
The producer refused to change it, explaining the crash in question resulted from multiple failures, and the crash was entirely real. The B 17 was a complete loss, but the crew had escaped OK, and watched sadly as their plane died. The fire crew had no idea there was going to be any crashes, and had not rehearsed.
Other scenes of crashes were computer generated, and more rapid in completion.