As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY CHECK / MAJOR REPAIR: LEFT WING LOWER SKIN AT RIB 13 JOINT HAS CHAFE FROM PANEL 552AB SEAL. BLENDED OUT AND REPAIRED PER SRAS DT/S-3140/12..7177 LEFT WING LOWER SURFACE SKIN AT RIB 13 JUNCTION FITTING BL 4750 BETWEEN STIFFENERS 8-10.