As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE A/C WAS IN FOR HEAVY CHECK FOUND GUSSET ON FR 89 FOR OUTBOARD PUCK POSITION OF FLOOR PANEL 252ERF HAS CORROSION. MX REMOVED AND REPLACED GUSSET PLATE AT FR 89, AFT GALLEY FLOOR AREA REF IAW EMB 170 SRM 51-42-02. PN 170-91919-001. A/C REMAINS IN CMH FOR HEAVY CHECK COMPLETION.