What was found
DURING HEAVY CHECK, RT HORIZONTAL STABILIZER, RIB 11 BETWEEN FRONT AND MID SPAR ON UPPER AND LOWER FLANGES CRACKED. PERFORMED A PERMANENT REPAIR OF DAMAGED RIB 11A FLANGES ON RT HORIZONTAL STAB IAW ETD 2014-170-015568. PERMANENT REPAIR REQUIRES INSPECTION TASK 55-10-017-0001 INTERNAL DET THRESHOLD OF 20000 F/C, INTERNAL 20000 FC THRESHOLD COUNTED SINCE NEW ISSUED DMI 412445/3. THIS IS A MAJOR REPAIR.