I've posted something similar to this earlier, but haven't gotten a solution yet. Every time I try to load KORD during the winter, spring, or fall seasons and during the day, it loads to about 55% and then boom, crash to desktop. This is an extremely frustrating problem, because if I forget to change the season before a flight and I try to fly into O'Hare, the game simply crashes. The only way it will work is if I select summer as the season. Also, I have continually tried to update the scenery installers and have done the suggested removal of the bglman files and installed the stand-alone addon manager, nothing seems to alleviate this problem.
If there is anyone who knows whats causing this and/or has a solution, please let me know!