As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING DESCENT, CABIN FUMES EVENT 11,000' NO APU (DIRTY SOCKS OIL). MAINTENANCE ISOLATED SOURCE OF ODOR TO THE APU. MAINTENANCE FOUND THE APU GENERATOR LEAKING AND REPLACED IT PER AMM 24-23-51. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.