What was found
DURING C-13 CHECK DISCOVERED CORROSION ON HAT CHANNEL LOCATED AT BS 956.5 + 7 AND FROM BL 14R TO BL 44R, WL 204. MAINTENANCE REMOVED CORROSION AT BS 956.5 + 7, FROM BL 14R TO BL 44R, WL 204 AND FOUND TO BE OUT OF LIMITS IAW BOEING 737-300 SRM 53-60-51-1 FIG 101. ALSO, DISCOVERED TO BE A PREVIOUS BLEND OUT OF SECTION. REMOVED HAT CHANEL AT BS 956.5 + 7, FROM BL 14R TO BL 44R, WL 204 FOR REPLACEMENT AND FABRICATED HAT SECTION IAW BOEING 737-300 SRM 51-40-02-0 FIG 13, BOEING 737-300 SRM 51-40-05-0 PAR 4A AND BOEING DWG 65C19883. INSTALLED FABRICATED REPAIR PARTS AT BS 956.5 + 7, FROM BL 14R TO BL 44R, WL 204 IAW BOEING 737-300 51-40-02-0 FIG 12.