Originally Posted by
CO Insider
Hi NYPDLieu, the part you're referring to is called an "Outboard Aft Flap" and is used to augment lift during take off and landing. The condition noted in your photos is actually an FAA-approved field repair that trims the end as noticed in the pictures. It's not too commonly used, but to be clear, there's nothing to be alarmed about when you see this.
Interesting. The clean cut and the shape had me a little stumped. The piece looks solid, not hollow. Wonder if it's a solid lightweight composite or if hollow, the cut was filled with something.