What was found
DURING C18 CHECK DISCOVERED CORROSION AROUND FASTENER HOLES IN WEB AT BS 860, WL 158 AND BL 18R. MAINTENANCE REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW BOEING 737-300 SRM 53-60-15-1A1. REMOVED AND INSTALLED NEW WEB AT BS 860, WL 158 AND BL 18R IAW BOEING 737-300 SRM 51-40-02-0G FIG 12.