As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: LEFT HORIZONTAL STABILIZER REMOVABLE LEADING EDGE PANEL 331B IS CRACKED RIB AT LEADING EDGE BS 95.96. THE CRACKED RIB WAS REMOVED AND REPLACED WITH A NEW SERVICEABLE RIB. PER B737NG AARD 51-00-05-01 DRAWING #186A1001.