What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK FOUND THE DORSAL FIN DOUBLER ON TOP OF FUSELAGE CHAFED IN 2 PLACES BETWEEN BS 857 AND BS 907, STR 2 LT AND STR 2 RT. MAINTENANCE CUTOUT DAMAGED AREA OF SKIN ON TOP OF FUSELAGE FROM BS 857 TO BS 907, STR 2 LT TO STR 2 RT; FABRICATED 3 FILLERS, A STRAP, A DOUBLER, AND A TRIPLER; INSTALLED REPAIR PARTS IAW B737-300 SRM 53-60-01, FIG 209.