As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY ODOR OF WET SOCKS IN COCKPIT DURING FLIGHT. ODOR ESPECIALLY INTENSE AT LOWER ALTITUDES. RAN NR 1 AND 2 PACKS AT POWER WITH CREW, COULD NOT DUPLICATE. OPS CHECKED GOOD AT THIS TIME IAW AMM 21-00-00. MX LATER REPLACED NR 1 ENGINE DUE TO OIL LEAK.