As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START CREW EXPERIENCED A FUME EVENT, TOXIC ODOR OF SWEATY SOCKS INDICATING WET SEALS IN THE COMPRESSOR SECTION LEAKING OIL. NO OIL LEAKS WERE FOUND IN THE ENGINE OR AIR-CONDITIONING SYS. NR 2 ENGINE START AND OIL ODOR, REPLACED DAMAGED OIL CAP O-RING AND DID THIRD BURN OUT AND ODOR CLEARED AND RECIRCULATION FILTERS WERE REPLACED AND CHECKS OK.