I suspect that the author of this mod still needs to make a few minor adjustments for this heli to be perfect. for now here is a way to spawn the vehicle for use if you happen to keep spawning this heli underground.

Add The heli to your trader.


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For those having trouble using this mod, it works if you add it to traders and allow it to spawn +3 on the Y axis

Here is an example of my TraderObjects. as you can see below
my <VehicleSpawn> 6671.82, 272.1, 13688.2
is 2 higher on the Y axis from
my Helipad <ObjectPosition> 6671.82, 269.155, 13688.2
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//HeliTrader
<TraderMarker> 13
<TraderMarkerPosition> 6704.65, 270.649, 13709.9
<TraderMarkerSafezone> 10

<Object> SurvivorM_Peter
<ObjectPosition> 6704.65, 270.649, 13709.9
<ObjectOrientation> -130.000000, 0, 0
<ObjectAttachment> LugWrench
<ObjectAttachment> WorkingGloves_Black
<ObjectAttachment> ReflexVest
<ObjectAttachment> JumpsuitJacket_Blue
<ObjectAttachment> JumpsuitPants_Blue
<ObjectAttachment> HikingBootsLow_Blue

<Object> ExpansionHeliPad
<ObjectPosition> 6671.82, 269.155, 13688.2
<ObjectOrientation> -130.000000, 0, 0

<VehicleSpawn> 6671.82, 272.1, 13688.2 // Vehicle Spawnpoint for Trader; Coordinate X, Coordinate Y, Coordinate Z (optional)
<VehicleSpawnOri> -130.000000, 0, 0 // Vehicle Spawnpoint Orientation; Yaw, Pitch, Roll (optional)

Have fun being able to spawn it in now guys for the ones not being able to figure it out.