What was found
AFT PIT FRAME HAS CORROSION AT BS727L BETWEEN STR25R AND STR26R AS MARK. GROUNDED - YES. EVALUATED AFT PIT FRAME AT BS737L FROM STR25R TO STR26R. FOUND TO BE OUT OF LIMITS DUE TO NO DAMAGE ALLOWED. INSTALLED REPAIR SPLICE AT DAMAGED AREA IAW B737-900 SRM 53-00-07-1A-1, 737NTM PT.6, 5100-0 PROC23, B737-NTM PT6 51-00-00 PROC16, B737-NTM PT.6 53-30-00 PROC 3, B737-900 SRM 53-60-07-2R-2, BAC5602, AND SOPM 20-20-02. APPLIED ALODINE, PRIME, BLEND OUT MARKINGS AND CIC TO BLEND OUT AREA IAW B737-900 SRM 53-60-07-2R-2, AMM 51-21-41, AMM 51-21-72 AND AMM 51-05-01-701.