What was found
AFT CARGO COMPARTMENT, RIGHT HAND FRAME SPLICE CORRODED AT STA 727L (AREA MARKED IN RED). GROUNDED - YES. EVALUATED THE CORRODED AFT PIT R/H FRAME SPLICE AT STA 727L. CORROSION IS LOCATED ON THE INNER CHORD. DAMAGE IS NOT PERMITTED ON THIS LOCATION PER B737-900ER SRM 53-00-07-1A-1.4.A.(2).(A). REMOVED CORRODED FRAME SPLICE PER B737-900ER SRM 51-40-02. FAB'D NEW SPLICE USING MAT .071" 7075-0. HEAT TREATED TO -T62 PER BOEING DWG: 146A1300-20 REV:A AND 146A1300 REV: - . INSTALLED NEW SPLICE PER B737-900ER SRM 51-40-02 AND BOEING DWG: 146A1251 REV: -.