As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OIL TRACE ON THE HORIZONTAL DRIVE SHAFT OF THE NR 1 ENGINE. REPLACED THE NR 1 ENGINE HORIZONTAL DRIVE SHAFT HOUSING PACKING IAW AMM 72-63-02-004-005 AND AMM 72-63-02-404-016 REV.124. PERFORMED A HORIZONTAL DRIVE SHAFT LEAK CHECK, NO LEAKS FOUND IAW AMM 71-00-00-795-034 R314.