As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, A VERY FOUL AND IRRITATING ODOR FROM THE PACKS WAS NOTED IN THE COCKPIT AND CABIN. MID LAV SMOKE ALARM SOUNDED. FUMES DISSIPATED AFTER ABOUT 5 MINUTES. MX FOUND OIL LEAK FROM CORE INLET OF NR2 ENGINE. MX REPLACED ENGINE NR 2 AND PERFORMED PACK BURNOUT.