As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT L N2 VIB FLUCTUATED BETWEEN 2.7-5.0 FL 180-N1 APPROX 45%-IDLE 270KTS. NORMAL ENGINE INDICATIONS OTHERWISE(<P>T/S IAW 767 FIM TASK 71-05 FAULT TREE 858. FOUND LPT DUCT DAMAGE. </P><P>REF LP 1145806. REMOVED AND REPLACED THE DUCT IAW CF6-80C2 ESM 72-00-04. PERFORMED LEAK CHECK IAW AMM 71-00-00-795-034.TEST 3. LEAK AND OPS CHECK GOOD. ALL PERAMETERS NORMAL. A/C OK FOR SERVICE</P>)