Collins FD-108 gain programming?
It's been over 15 years since I've used the FD-108, and I don't remember the gain programming.
If I remember correctly, first stage starts at radio altitude around 1200'. Second stage (ILS extend) at 200.
If there is not radio altimeter, GP extend is triggered by the MM.
If there is no RA, first stage starts at LOC capture, and runs for about 75 seconds, then goes into GP extend if there is no MM.
I have one source that says there is NO first stage down programming, and the only reduction is at the MM.
I'm trying to help a friend, and I'd appreciate your assistance.