As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT FUSELAGE MAIN CABIN LT INBD UPPER GUSSET PN 170-60257-001 AT FRAME 90 Y=-260.4 HAS CORROSION. ACCOMPLISHED PERMANENT REPAIR BY REPLACEMENT OF AFT MAIN CABIN LT INBD UPPER GUSSET PN 170-60257-001 AT FRAME 90 Y=-260.4 IAW EO NO E175-5300-123 REV IR WO 1958236 & 19451292C7.