What was found
AFT PIT DOOR CUTOUT LOWER SILL WEB HAS CORROSION ALL OVER. GROUNDED - YES. REMOVED CORROSION ON AFT PIT LOWER SILL WEB IAW B737-700 SRM 51-10-02 ORIG THICKNESS, 0.045 IAW B737-700 53-60-15-0I-1. REMOVED 0.007. REMAINING THICK. 0.038. FOUND TO BE NOT WITHIN ALLOWABLE LIMITS. REMOVED CORRODED WEB IAW B737-700 SRM 51-40-02. UT GAUGE TOOLING ID: T8225P LOCATED, DRILLED, RECEIVED NEW PART LOWER SILL WEB. IAW THE FOLLOWING: BAC PL 146A8120 REV T SH 17, B737-700 SRM 51-40-05, BAC DWG 146A8123 REV C SH 6 BAC DWG 146A8120 REV E SH 3. P.N: 146A8123U6. P.O# 904518.4. INSTALLED WEB IAW B737-700 SRM 51-40-02; AND BAC DWG 146A8340 REV- SH19, AND BAC DWG 146A8340 REV A SH 9.