What exactly would be your proposal to change in the mod to make it work?
You need to combine these names into a single name:
1. "heli-item" / "heli-recipe" / "heli-entity-_-" == "heli"
2. "heli-pad-item" / "heli-pad-recipe" == "heli-pad"
Or whatever you think is appropriate to call them.
I just did this by searching for all matches, since some of them were in different files.
I tried the pull request, but it redirects me to the owner's repository, the very first one. I don't understand how to make a request to your repo, so I can just tell you where I found the name matches, if that's appropriate.
line number
control.lua : 234, 404, 422
en \ locale.cfg : 30, 33, 39, 42, 46, 49, 50, 54, 60, 63
logic \ heliAttack.lua : 15, 37, 49
prototypes \ items.lua : 4, 150, 155
prototypes \ prototypes.lua : 57, 67, 84, 90, 162, 166
prototypes \ entities \ heli_entity.lua : 21, 97, 104, 193, 262, 332, 400, 472, 544, 634
prototypes \ entities \ heli_pad.lua : 17, 59
prototypes \ entities \ rotor_entity.lua : 10, 81
It seems like these are all coincidences.