What was found
UPPER FUSELAGE STATION 720D FRAME, AFT EDGE IS CORRODED AT STRINGER 4 RIGHT AREA REMOVED CORROSION AT UPPER FUSELAGE STA 720D FRAME AFT EDGE AT STR 4 RIGHT AREA REF SRM 51-10-6 ORIGINAL MATERIAL .064", MATERIAL REMAINING .048" MATERIAL LOSS .016". FOUND TO BE OUT OF LIMITS REF SRM 53-10-1 FIG 1. FABRICATED REPAIR DOUBLER REF SRM 51-40-3 FIG 1, MATERIAL USED 7075-0, .063" HEAT TREATED TO T-6, TRACKING NR 2007- 11-015 W/O N00740. TREATED AND PRIMED DOUBLER AND INSTALLED REF SRM 51-10-2, 51-30- 2. THIS IS CLASSIFIED AS A MAJOR REPAIR.