Fastend Ribs to lower Flap Skin Fastend lower Flap Skin to main Flap Skin at spanwise joint Fastend Ribs to main Flap Skin Fastend two end Ribs Machine countersunk the flap spar Fastend the End Bracket to the Spar Fastend the Spar to the Ribs Fastend the Spar to the top Flap Skin Fastend the Spar and Flap Hinge to the lower Flap Skin Spar was noted to be twisted Adjusted the trailing edge bend radius...twist gone.