What was found
ON TAKEOFF HAD SMOKE IN COCKPIT, COURIER AREA & MAIN CARGO, FIRE EICAS MSG, TURNED BACK. MAIN CARGO FIRE ALERT WENT AWAY & SMOKE CLEARED BY THE TIME WE WERE ON THE GND. NR 1 ENG, FOUND ENG OIL TO BE OVER SERVICED, NOTED OIL SPILLING OUT OF SCUPPER WHEN OIL CAP WAS OPENED. DRAINED APPROX 1 GALLON OF OIL FROM NR 1 ENG TO PROPER SERVICING LEVEL IAW MM 79-11-00-3. RAN ENG IAW JRH CH 6 AT IDLE. NO SMOKE NOTED INSIDE ACFT, BUT DID NOTE SMELL OF OIL. REPLACED LT RECIRC AIR FILTER IAW MM 21-25-02-4. OLD FILTER DID NOT APPEAR TO HAVE OIL CONTAMINATION OR SMELL. RAN NR 1 ENG AGAIN, WITH NORMAL OPERATING OIL QTY OF 12-15 QTS IAW MM 79-11-00-3 IAW FIM 21-00 AFTER RECIRC AIR FILTER, R & R. PERFORMED OPERATIONS TEST OF AIR RECIRC FAN IAW MM 21-25-00. OPERATIONS CHECKED NORMAL. RAN BOTH ENGS AT HIGH POWER IAW JRH CH 7 WITH BLEEDS IN NORMAL FLIGHT CONFIG FOR 4 MINUTES. NO SMOKE OR OIL SMELL NOTED DURING DURATION OF ENG RUN.