If this is the 64bit 767 Captain II (P3Dv4/P3Dv5), then see this topic:
https://www.captainsim.org/forum/csf.pl?num=1626849797

The above Topic is on Page 7 of the 767 Captain II - General forum, there could be more topics on CTD problems with the 767 Captain II beyond page 7, but that's where I stopped after finding the above Topic.

If this is a problem with the 32bit 767 Captain in P3Dv3, then you need to understand that it wasn't supported in P3Dv3, and I don't know of a solution (I installed in FSX, and copied all the files over to P3Dv3 and it worked fine for me).