Dears,
I’ve a just bought an incident KT3.
I’m looking to apply SB 9 relative to flap hanger.

on my KT is already present something like an alluminium reinforcement on wing ribs fitting.
base on your experience, this reinforcement was required from original build manual, or was an improvement from builder mind?

BC4DCCBB-FAB5-45B7-935E-2C4BD5A8B0FE.jpg
( see picture for detail )