As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG DIRTY SOCK SMELL IN THE LAST 15 MINUTES OF FLIGHT. A REPEAT EVENT OCCURRED THE FOLLOWING DAY (19 SEPT) DIVERTED TO PHL AND DECLARED EMERGENCY. NO SOURCE OF ODOR FOUND AT THIS TIME. FOUND EXCESS ZIP CHEM IN FORWARD CARGO BELLY. CLEANED AS REQUIRED. NO FURTHER ODORS NOTED.