What was found
MCN - MAJOR REPAIR - DURING C-20 CHECK CORROSION WAS FOUND ON L-2 DOOR ENTRY WAY CREASE BEAM UPPER OUTER CHORD BETWEEN BS 960 AND BS 983, LBL 55, WL 209. MAINTENANCE REMOVED CORRODED CREASE BEAM UPPER OUTER CHORD FROM BS 960 TO BS 983, LBL 55, WL 209; FABRICATED A NEW REPLACEMENT CHORD; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 8 PG 1 & 38.