I kinda missed the plane crash, but by the time you said "gardening plane" you pretty much lost anyways, especially after suiciding two T34s and some infantry right before it.
Funny enough: you had full infantry and quantity superiority, and didn't make use of it for the whole first 20 minutes (no cutoff play, no additional capping, nothing).
So, no, not any plane crash lost you the game, it just finished what was about to happen anyways.
Funny you said that, because I had the impression that you couldn't do anything because you were running into my position and getting reppeled. I don't think I dropped bellow 400 points playing Langerskya from the worse side. This plane just took half of my army and delayed my ISU by quite a margin so unless you're talking about different game than it's all in the replay.