Are parked plane undestructable?

[SCG_motoadve]

Me 110 G fire and fire at them even crashed in to it, and was not destroyed.

[PatrickAWlson]

They are static planes.  They can be destroyed but the game treats them more like buildings than planes.

[SCG_motoadve]

Dam this is why then  I emptied the ammo of my Bf 110 into one and even crashed into it and couldnt destroy it.

[TheSNAFU]

Dam this is why then  I emptied the ammo of my Bf 110 into one and even crashed into it and couldnt destroy it.

Oh My! I hope that isn't consistently the case