As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, FOUND FRAME FITTING SHIM AT CUSP HAD COROSION. FRAME HAD SURFACE CORROSION AND HOLE DRILLED IN RADIUS FS 1560 RIGHT. REMOVED CORROSION. REMOVED AND REPLACED FITTING. FABRICATED AND INSTALLED FRAME REPAIR IAW DER APPROVED COTNEY ENGINEERING SKETCH SKA 94190-4.