first as SamuriaSax suggests make sure you have the game fully updated, both in the Marketplace And in Content Manager, the g58 is a Deluxe or better aircraft so something may just be missing
next make sure you have No 3rd party content, particularly for this aircraft but remove ALL Non-Official content (addons, mods & liveries) for testing, both in the Content Manager And in your Community folder (i know this gets to sound like a broken record but its necessary to eliminate possible conflicts)
if that doesnt fix it your stuck making a zendesk ticket i would guess