What was found
DURING C4 CHECK, CORROSION FOUND AT L3 EMERGENCY EXIT DOORWAY INTERNAL LOWER SILL AT BS 1320, S17L. REPLACED INTERNAL LOWER SILL IAW SRM 51-40-02.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING C4 CHECK, CORROSION FOUND AT L3 EMERGENCY EXIT DOORWAY INTERNAL LOWER SILL AT BS 1320, S17L. REPLACED INTERNAL LOWER SILL IAW SRM 51-40-02.