As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT LEFT FLOOR TRANSITION PANEL HAS CORROSION THROUGHOUT BS727 -BS787. GROUNDED - YES. CUSTOMER REF. ONLY; SEE CUSTOMER CARDS G1553675, G153678, G1553679, G1553682AND G1553752 FOR MAT ORIG. LOSS AND REMAINING TRACKING PURPOSES. REMOVED LEFT TRANSITION PANEL FROM 727-787. FABRICATED AND INSTALLED NEW TRANSITION PANEL IAW B737-800 SRM 53-00-53-2R-5 REPAIR 5.