What are these holes on the bottom of the wing? (Citation X)

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It's called "Manhole" Used for inspection/repair

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That’s not very progressive towards an inclusive workforce.

We call them “personholes”

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Liked it 😜

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Access panels for when you need to inspect or service stuff in the wet bays of the wing.

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Make sure to defuel first. Or else you taking a bath.

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All those panels actually seal in the fuel?

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I don’t work on this plane but on mine, yes. Maybe not the last 2 or something.

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Panels for access to inner wing structure and fuel cells. There’s roughly 100 of them between both wings and center wing.

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You pop one off and can look at stuff inside the wing. Used for maintenance.

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The oval things? Access/inspection panels.

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Access panels for the interior of the wing.