What was found
THE INBOARD FLAP SUPPORT ARM CAME IN CONTACT WITH A SUPPORT BRACKET THAT ATTACHES THE LOWER WING SKIN TO THE FLAP TRACK IN AN EFFORT TO STIFFEN THE SKIN. THE SUPPORT BRACKET HAD A LONGITUDINAL CRACK ALONG THE INSIDE OF A NINETY DEGREE RADIUS. BECAUSE OF THE CRACK, THE BRACKET RECEDED APPROXIMATELY 1/8TH OF AN INCH, ALLOWING THE TIP OF THE INBOARD FLAP SUPPORT ARM TO MAKE CONTACT WITH THE CRACKED BRACKET, CAUSING THE FLAP TO BIND. THE INBOARD FLAP SUPPORT ARM CAME IN CONTACT WITH A SUPPORT BRACKET THAT ATTACHES THE LOWER WING SKIN TO THE FLAP TRACK IN AN EFFORT TO STIFFEN THE SKIN. THE SUPPORT BRACKET HAD A LONGITUDINAL CRACK ALONG THE INSIDE OF A NINETY DEGREE RADIUS. BECAUSE OF THE CRACK, THE BRACKET RECEDED APPROXIMATELY 1/8TH OF AN INCH, ALLOWING THE TIP OF THE INBOARD FLAP SUPPORT ARM TO MAKE CONTACT WITH THE CRACKED BRACKET, CAUSING THE FLAP TO BIND.