It briefly shows up on info panel as coming then disappears, when I look at the log I see this:

19:00 [Info] [AutomatedEvents] Spawning HeliControl Helicopter
19:00 [Info] [AutomatedEvents] Killing Pilot Eject

What does the second line mean?  It never comes, so I assume it's crashing into the water?

simple workaround till I fix this, for all events set this:  
"DisableDefault": false,

Okay, will do thanks!

Will this work if server events are disabled or will I need to re-enable? also I have the personal heli plugin installed and it does the same thing, it says heli inbound but then nothing.

it will not work with them disable , but you can set their spawn frequency super massive.

I've got the same issue the OP has, none of my events run except cargo (by itself), and chinook when i call it via /runevent chinook, attack heli, airdrop and bradley do not spawn at all. when i use the /runevent command they appear in infopanel for a second then disappear and nothing happens, my console tells me its spawning them/has called an airdrop to x coordinates but nothing shows up.

set disabledefault to False.
I am working on a fix but it is not ready yet, I had got swamped at work so will have time this weekend to work on it.

Merged post

This should be addressed in the recent release.  please delete and recreate the configuration.  Please confirm this is corrected.