As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A BLEED AIR SMOKE REPORTED IN UPPER DECK BY MAINTENANCE JUMPSEATERS AND NOTICEABLE BY FLIGHT CREW AT TOP OF DESCENT. ISOLATED NR 3 PACK AND SMOKE DISSIPATED. RAN 1 & 2 PACKS ONLY. VERIFIED ACM OIL SERVICED TO PROPER LEVEL. FOUND OIL RESIDUE IN COALESCER BAG. NO PART AVAIL. DEFERRED NR 3 PACK.