As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: POSSIBLE CRACK ON LEFT STAB INTERNAL STRUCTURE WEB 3RD RIB FROM FORWARD TO AFT LOWER SIDE LEADING EDGE BS 142.45. REMOVED AND REPLACED RIB (FITTING). PER BOEING DWG 182A5305 REV D AND B737-NG SRM 51-40-02-0G.