What was found
MCN - MAJOR REPAIR - DURING C-21 CHECK DISCOVERED 2 CRACKS .275 INCHES LONG LOCATED AT THE BOTTOM OF THE NR 6 SLAT SKIN, SLAT STATION 307 TO SLAT STATION 309. MAINTENANCE REMOVED DAMAGED AREA FROM THE BOTTOM OF NR 6 SLAT SKIN FROM SLAT STATION 307 TO SLAT STATION 309. FABRICATED REPAIR FILLER AND SPLICE PLATE IAW BOEING 737-300 SRM 57-43-01-2 FIG 206. INSTALLED FABRICATED REPAIR PARTS AT BOTTOM OF NR 6 SLAT SKIN FROM SLAT STA 307 TO SLAT STA 309 IAW BOEING 737-300 SRM 57-43-01-2 FIG 206.