As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE INSPECTION, CRACKS WERE DISCOVERED IN THE TOP SKIN AND RIB AT STA 76 OF THE LEFT HORIZONTAL STABILIZER. THE CRACK RAN FOR SEVERAL INCHES FORWARD AND AFT OF THE FORWARD J-CHANNEL. SI NR 0131-130, HAD BEEN PREVIOUSLY CW. SUBMITTER STATED POSSIBLE CAUSE AS VIBRATION DUE TO SLIP STREAM.