As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ODOR NOTED IN BACK OF AIRCRAFT. CAPTAIN TURNED OF AC PACK AND DESCENDED PER QUICK REFERENCE HANDBOOK. ODOR BECAME WORSE AFTER DESCENT. AIRCRAFT DIVERTED TO PIT EMERGENCY WAS DECLARED AND AIRCRAFT WAS NOT OVERWEIGHT FOR LANDING. ACCOMPLISHED SMOKE ODOR FUMES INITIAL TROUBLESHOOTING CARD PER JOB CARD 08L00021001. NO ODORS REPLICATED.