FSX Boeing 307 Stratoliner ver 1.1. The Boeing 307 was the first pressurized airliner. Because of the war, only 10 were built, initially for Pan American and TWA (and a special version for Howard Hughes). Five versions are included here, in PanAm and TWA colors as well as Airnautic and Aigle Azur. This version 1.1 is for FSX only, and has been modified to work correctly with all versions of FSX. FS2004 users should download B307_V10.zip instead. By Jens B. Kristensen.