I have the latest fsbuild 126.96.36.199, and I'm using the latest navdata. When I go to KLAX, and drop down the list of SIDS, I don't see PRCH9 listed. If I open the sids.txt file, I do see it listed under KLAX.
What am I doing wrong?
Probably nothing... PRCH9 is a vectored procedure - there are no waypoints directly associated with it and FSB wouldn't know what to do in terms of entering waypoints in a flightplan. Essentially you fly runway heading until told to go to one of several points.