Installation:

1: Install this mod:
https://www.gta5-mods.com/vehicles/airbus-a380-800-add-on 

2: Extract the "A380_sign_23.dds" file. Rename if necessary.

3: Using OpenIV with Edit Mode enabled, add the texture to the "a380.ytd" file

Credit for the Airbus A380 plane goes to Zackintosh & SkylineGTRFreak