As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H HORIZ LWR SKIN CRACKED AT STA 101 27.5 IN AFT OF FRONT SPAR. GROUNDED - YES. REPAIRED HORIZONTAL SKIN IAW 737 900 SRM 55 10 01 2R 11 REPAIR IS A CATEGORY B REPAIR WITH AN INSPECTION THRESHOLD OF 56,000 CYCLES WITH REPEAT INSPECTION EVERY 9,000 CYCLES.