Heat oven to 350℉/177℃.
Spray three 9-inch round pans with cooking spray. Set aside.
Whisk flour, sugar, baking powder, baking soda, salt, and cinnamon together.
In a separate bowl, whisk together eggs, vegetable oil, pineapple, and vanilla.
Pour wet ingredients into dry ingredients.
Mix only until combined. Do not beat!
Gently stir in bananas and pecans.
Divide evenly among prepared pans.
Bake for 30 to 35 minutes, until it tests done.
Remove from oven and let cool in pans for about 10 minutes.
Turn out onto cooling rack and allow to finish cooling.