What does my dream about plane crashing mean?

I am by no means an expert but if it means anything at all, which some dreams do, it could mean a few different things. It could be symbolic of a loss of control, it could be a fear of losing your mom(you didn't specify what you are going through, has it been health issues or relational issues). It could be separation anxiety. Depends on what is going on with you and her. Those are just a few ideas at least, but I am not a professional and am not an expert by any stretch of the imagination.