In case Kumpu doesn't have time to fix this great little mod here is a quick fix.
open the zip with the mod and open this file:
/Helicopters_0.2.13/prototypes/entities/heli_entity.lua

Go to line 10 and 97 and change

flags = {"pushable", "placeable-off-grid", "player-creation"},

to

flags = {"placeable-off-grid", "player-creation"},

I have no idea if it breaks something, but i loaded the mod a flew a little around the and everything seems to work.

PS. thanks for a fun little mod (:

Thanks for this!

thank you!

What's the matter? Did an update break something?

Latest factorio update seems to have fixed the problem :-)

I think 16.28 removed the pushable flag, since it didn't have any effect. But a later update changed it to just ignore it, since a lot of mods had it. So this quick fix is no longer needed.

I see, thanks!