This is a PACK of 4 storage buildings created by N & M Modding Facebook page.
1 in box 6,
1 in 7 box
2 in box 8.
The plane and its trigger provided. In the pack you will find a dossier.txt where you can see if it is in buildings.
Credits: N&M Modding
BatimentStackageGrain_NM_Modding (file size = 2 MB)