As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND CORROSION AFT WET AREA ON GUSSET AT FRAME 90 AND INTERCOSTAL OUTBOARD OF LH TRACK BEAM. REMOVED AND REPLACED AFT WET AREA ON GUSSET AT FRAME 90 AND INTERCOSTAL OUTBOARD OF LH TRACK BEAM REF SRM 51-40-02, 51-40-08. A/C REMAINS IN CHECK.