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" CRACK WAS FOUND IN UPPER ANGLE OF INTERCOSTAL BETWEEN BS 927 AND BS 947, BL "0". MAINTENANCE REMOVED CRACKED UPPER ANGLE ON INTERCOSTAL FROM BS 927 TO BS 947, BL "0"; FABRICATED A NEW REPLACEMENT UPPER INTERCOSTAL ANGLE PER DWG 69-36656 AND INSTALLED REPAIR PART.