As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LP177985 DISCREPENCY ITEM 1 -- FUME EVENT IN DESCENT AT 14000' TO LANDING SMELLED LIKE DIRTY SOCKS. FOUND OIL LEAKING FROM APU OIL DRAIN PLUG REPAIR PLUG LEAK CHECK GOOD REF LP177989 FOR ENGINE AND APU RUNS FOR TWO HOURS AMM 05-50-816-831