As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT DIVERTED ON ACCOUNT OF CABIN DIRTY SOCK ODOR. EMERGANCY WAS DECLARED. MAINTENANCE DETERMINED APU TO BE SOURCE OF ODOR. MAINTENANCE ACCOMPLISHED BORESCOPE INSPECTION OF APU LOAD COMPRESSOR, NO FINDINGS. ACCOMPLISHED JOB CARD 33L000021003. NO FURTHER ODORS WERE NOTED.