I think, its just a logbook entry for the actual Cessna child seat since its listed for most all serial number 150s. That's what my mechanic did anyway.
Don't forget the W&B change too.
Thanks Ron. I forgot, we did have to do that too.
N8395M 1970 A150K The Carolina Swampfoxes founding member I've landed my Aerobat in the following states: