What was found
GYR - DURING C12 CHECK DISCOVERED CORROSION, LEVEL 2 INTERGRANULAR, ON R3 LOWER DOOR EMERGENCY LOWER WEB FROM BS 1340 TO BS 1360, WL 208.1, STR 17R, FROM BL 70R TO BL 79R. MAINTENANCE REMOVED CORROSION FROM WEB LOWER SIDE FROM BS 1340 TO BS 1360, WL 208.1, STR 17R, FROM BL 70R TO BL 79R IAW BOEING 757-200 SRM 51-40-02-0G. CORROSION FOUND OUT OF SRM LIMITS. REMOVED THRESHOLD WEB FROM BS 1340 TO BS 1360, WL 208.1, STR 17R, FROM BL 70R TO BL 79R IAW BOEING 757-200 SRM 51-40-02. INSTALLED FABRICATED THRESHOLD WEB FROM BS 1340 TO BS 1360, WL 208.1, STR 17R, FROM BL 70R TO BL 79R IAW BOEING 757-200 SRM 51-40-02.