As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: VERY FOUL ODOR ON CLIMB OUT OF LAS VEGAS. SMELL WENT AWAY. THEN ON LANDING AROUND 3,000 FEET SMELL CAME BACK ALL THE WAY TO GATE. O2 MASK WAS USED. SMELLED LIKE DIRTY GYM SOCKS ON CLIMB OUT AND BURNING OIL ON LANDING. CABIN CREW SAID THEY SMELLED ON LANDING BUT NOT ON TAKE OFF. (OPEN).