As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE FOUND CORROSION-AFT CARGO DOOR-HORIZONTAL BEAM FINGER DOUBLER HAS CORROSION ON TOP CENTER AREA. REMOVED AFT CARGO DOOR HORIZONTAL BEAM FWD FINGER DOUBLER REF SRM 51-43-04, DAMAGE LENGTH 1.5"; WIDTH 0.4"; DEPTH 0.025". LOCATED AND DRILLED NEW FINGER DOUBLER REF SRM 51-40-02. INSTALLED NEW FINGER DOUBLER REF SRM 51-43-03, 51-43-04; APPLIED TOPCOAT TO FASTENERS REF SRM 51-23-06. THIS ITEM HAS BEEN CLASSIFIED AS A LEVEL 2 CORROSION