Aircraft Upgrade Items
Aircraft-upgrade items are confirmed seasonal rewards in the free Ace Pass. Their names, stat values, stacking rules and relationship to the freely combinable pre-sortie upgrade parts have not yet been published.
A free progression reward
The official FAQ says the free Ace Pass contains cosmetics and aircraft-upgrade items along its seasonal track. Paid randomized loot boxes are not planned, and rewards are visible before purchase.
Do not confuse items with the parts menu
The walkthrough separately confirms freely combinable upgrade parts in the sortie loadout. Bandai Namco has not yet explained whether Ace Pass upgrade items are those same parts, materials, or another item class, so this tracker keeps the systems distinct until the menu is shown.
Aircraft Upgrade Items FAQ
Are upgrade items only in the paid pass?
No. Aircraft-upgrade items are explicitly listed in the free Ace Pass.
Are their stats known?
No complete item list or stat table has been published.