Here’s my F/A-18 Hornet walkaround of A21-10. The RAAF has been operating Hornets since 1985 and we have a flet of 75. They have been continuously upgraded over the years including airframe-life extension, avionics upgrades, and mods to make them more compatible with those of our US allies, and a new radar. These mods effectively make them C/D models. A21-10 started life as an A model.