Only YY fares are displayed in FD and not carrier fares that used to be displayed. Why?
Some carriers file fares using the YY carrier code (carrier specific YY fares), especially to and from North America. In the legacy system, these fares were exploded, YY being replaced by the applicable carrier code. This process has been removed from the Galileo 360 Fares system. These fares now display with the YY carrier code (see the phase 3 functional advisory book).