What was found
LEFT WING NR 4 SLAT, SLAT TAB AT INBD MAIN TRACK HAS MATERIAL MISSING AROUND FASTNER. REPAIRED THE LT WING NR 4 INBD SLAT CLOSE OUT PANEL AT OSS 531.75 - 607.24 IAW SRM 57-43-01-2R, FIG 201, REPAIR 3, SHEET 3. SEE JPF FOR ALL WORK PERFORMED. MAJOR REPAIR.