18-03-2019, 01:47 PM
Ok, it seems there is a discrepancy between payload model .ini name and the aircraft title. Make sure both are the same. Whatever the .ini name is, change the aircraft title to the exact payload .ini name in the aircraft .cfg. This should make FsP recognize the payload model. It's the quirk of FS9 and FsP. I remember having to do this for a number of aircraft when I used FS9.
See FsPassengers Frequently Asked Questions: FAQ