Below are ways how to unlock certain wing parts. If there aren't any explanations about difficulty required in order to unlock those parts, that means you can unlock them in Easy or Normal difficulty during your 1st or 2nd playthrough.
Part | How to unlock
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| - Destroy ace named "Timeline" in mission 13.
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| - Destroy ace named "Osaka" in mission 3 at Ace difficulty.
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| - Destroy ace named "Balalaika" in mission 5A at Ace difficulty.
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| - Destroy ace named "Gizmo" in mission 9 at Hard difficulty (2nd playthrough).
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| - Destroy ace named "Hayate" in mission 17 at Hard difficulty (2nd playthrough).
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| - Destroy ace named "Buzzword" in mission 10.
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| - Destroy ace named "Balalaika" in mission 5A or "Jolly" in mission 5B.
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| - Destroy ace named "Balalaika" in mission 5A or "Jolly" in mission 5B.
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| - Destroy ace named "Sphinx" in mission 6 at Hard difficulty (2nd playthrough).
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| - Destroy ace named "Vulcan" in mission 21A.
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| - Destroy ace named "Garnet" in mission 21B at Hard difficulty (2nd playthrough) or "Timeline" in mission 13 at Ace difficulty.
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| - Destroy ace named "Balalaika" in mission 5A or "Jolly" in mission 5B.
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| - Destroy ace named "Express" in mission 18 at Hard difficulty (2nd playthrough).
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| - Destroy ace named "Strigon", "Gryphus1", "Garm1", "Wardog", "Zipang", "Yellow 13", "Mobius1", "Dision", "Z.O.E", and "Phoenix" in mission SP2.
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| - Destroy ace named "Watercress" in mission 1 at Hard difficulty (2nd playthrough).
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