What was found
MCN - MAJOR REPAIR - DURING C-19 CHECK EXFOLIATION CORROSION WAS FOUND ON FLOOR SUPPORT BETWEEN BS 950 AND BS 966, LBL 18, WL 208. MAINTENANCE REMOVED CORRODED FLOOR SUPPORT FROM BS 950 TO BS 966, LBL 18, WL 208; FABRICATED A NEW REPLACEMENT FLOOR SUPPORT; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 12-13.