What was found
INSPECTION TYPE:C1 LT AFT EXTERIOR FUSELAGE STA 1766, LONG 28L, FUSE SKIN SEAM BULGING. REMOVED CORRODED LONGERON 28L, CLEANED AREA. REMOVED AND REPLACED INTERNAL DOUBLER AND REPLACED L28L SECTION 1690-1766 IAW SRM 51-1-8, 51-1-21, 53-2-0 FIG 1F, 51-1-20D53-5-3.