What was found
MCN - CORROSION ON R-4 DOOR SILL UPPER SURFACE OF LOWER SILL AFT INNER CHORD, B/S 1661-1681, RBL 57, WL 208. REPLACED R-4 DOOR SILL AFT INNER CHORD B/S1661-1681, RBL 57, WL 208 IAW B757-200 SRM 51-40-02-0G PARA 7D FIG 12.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MCN - CORROSION ON R-4 DOOR SILL UPPER SURFACE OF LOWER SILL AFT INNER CHORD, B/S 1661-1681, RBL 57, WL 208. REPLACED R-4 DOOR SILL AFT INNER CHORD B/S1661-1681, RBL 57, WL 208 IAW B757-200 SRM 51-40-02-0G PARA 7D FIG 12.