What was found
AFT ACCESSORY COMPARTMENT, FRAME BS 1520 BETWEEN LONGERONS 1 - 24L, LOWER END OF FRAME HAS SEVERAL SPOTS WITH CORROSION. REMOVED CORROSION. FOUND TO BE OUT OF LIMITS. FABRICATED AND INSTALLED A REPAIR IAW DWG 9911839, REV DP, SRM 51-30-02 AND 51-30-03.