Hi there!
To help keep the forum organized, please use the #bugs-and-issues subcategories. Before posting, see if a topic exists that relates to your issue. Here is a search result for “CTD” (crash to desktop):
Search results for ‘ctd category:200’ - Microsoft Flight Simulator Forums
One in particular:
Crash to desktop without error message - Bugs & Issues / Performance, Graphics & CTDs - Microsoft Flight Simulator Forums
Thank you.