What was found
AFTER TAKEOFF, SMOKE IN COCKPIT & COURIER AREA & MAIN CARGO FIRE EICAS MESSAGE. TURNED BACK, MAIN CARGO FIRE ALERT WENT AWAY & SMOKE CLEARED. ENGINE OIL QUANTITIES 1120Z ARE 23 LT & 22 RT. NO ODORS OR SMOKE AT THIS TIME. RAN NR 1 ENGINE IAW JRH. NOTED OPERATING OIL QTY LEVEL AT 16-17 QTS AFTER TEMP STABILIZED. DURING ENGINE OIL SERVICING CHECK OF NR 1 ENGINE, FOUND ENGINE OIL TO BE OVERSERVICED . NOTED OIL SPILLING OUT OF SCUPPER WHEN OIL CAP WAS OPENED. DRAINED APPROXIMATELY ONE GALLON OF OIL FROM NR 1 ENGINE TO PROPER SERVICING LEVEL IAW MM 79-11-00-3. RAN ENGINE IAW JRH CHAPTER 6 AT IDLE. NO SMOKE NOTED INSIDE AIRCRAFT, BUT DID NOTE ODOR OF OIL. REPLACED LEFT RECRIRCULATION AIR FILTER IAW MM 21-25-02-4. OLD FILTER DID NOT APPEAR TO HAVE OIL CONTAMINATION OR ODOR. RAN NR 1 ENGINE AGAIN, WITH NORMAL OPERATING OIL QTY OF 12-15QTS IAW MM 79-11-00-3.