What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK CORROSION WAS FOUND ON R-1 DOOR CUTOUT UPPER AFT REVEAL AT FASTENER HOLE BS 336, STR 10 RT. MAINTENANCE REMOVED CORRODED R-1 DOOR UPPER AFT REVEAL AT BS 336, STR 10 RT; FABRICATED A NEW REPLACEMENT REVEAL; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02, FIG 3-4, & 6-8.