As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK A 1.375 INCH CRACK WAS FOUND ON AFT END OF RT STRINGER 18A WEB AT BS 727. MAINTENANCE TRIMMED OUT CRACK AT AFT END OF RT STRINGER 18A SHEAR WEB, BS 727; PERFORMED HFEC INSPECTION OF VERIFY NO CRACKS EXIST. FABRICATED A FILLER AND RADIUS BLOCK; INSTALLED REPAIR PARTS IAW AWA ER 03-5363-03097-TB3.