Csturdiv From United States of America, joined Aug 2005, 1391 posts, RR: 3 Reply 3, posted (7 years 5 months 2 weeks 6 days ago) and read 3177 times:
They are not meant to be AI, and if you do use it, not only would it be a frame rate hit, but it might act odd and not perform right. Back before I really got into AI and was still using the MS default 737, 747 and 777 models and replacing the default textures with real ones, I ventured into using Posky 757 and 767s. I remember one time flying out of SFO and was holding short for a HA 767 on finals. It never reached the airport since it landed short in the water. The FDEs for user flyable models are just not meant for AI use. If you do use that model, you might want to mess around with replacing the FDE (the .air file and portions of the .cfg file) with those of an AI 757 to see if it performs better.