As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERCOSTAL AT STRINGER 21L STA 967 TO 986 IS CRACKED. FOUND UPON REMOVAL FOR STRINGER REPAIR. GROUNDED - YES. REMOVED INTERCOSTAL, FABRICATED INTERCOSTAL, AND INSTALLED INTERCOSTAL IAW B737-900 SRM 51-40-02-0G-0, BOEING DWG 147A8801-95.