HiI am in the 737-700 flying the star, when ATC changes the arrival r/w, so I select dep/arr on the fmc and switch to the new one and exec, which seem to work ok. But it wiped out the rest of the waypoints on the star, I tries to enter the star again but that would not work, perhaps because I was already past the first waypoint. Did I do this wrong or should/does this happen?MTIASteve

Steve,It should not wipe out the STAR's waypoint - it should only change what's after the STAR, the approach section. Can you give a more clear step by step example of exactly where/what this is?

I was on the BNN3A to Heathrow, but I was past BNN (VOR), the arrival r/w was 27R, but was changed to 27L. I can't really expand on the FMC entries that I made.Steve