As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD CARGO; AIRPHONE DOUBLER BETWEEN STA 500A TO 500B; BL0 HAS CORROSION ON UPPER SURFACE WITH EVIDENCE OF CORROSION BETWEEN FUSELAGE SKIN AND AIRPHONE DOUBLER. ( DOUBLE BULGING FROM SKIN) / REMOVED AIRPHONE DOUBLER BETWEEN STA 500A - 500B BL0; LOCATED; DRILLED AND INSTALLED NEW PART IAW B737-700 SRM 71-40-02-0G-0; 51-40-05-0G-0 DWG:143A3230 REV:A P/N 143A3233-4. A TAG# WN8329.