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-18 CHECK A 1 1/4" CRACK WAS FOUND ON THE AFT END OF STRINGER WEB 18 L/H AT INBOARD FASTENER HOLE BS 725. MAINTENANCE REMOVED ANGLE, AND SLOTTED STRINGER WEB EXTENDING THE CRACK TO SECOND FASTENER HOLE. FABRICATED GUSSET AND RADIUS FILLER, AND INSTALLED REPAIR PARTS & ANGLE IAW AWA ER 03-5300-02193-ES2.