As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. FLIGHT CREW REPORTED A CABIN ODOR DESCRIBED AS A DIRTY SOCK ODOR CAUSING THE PASSENGERS AND CREW TO BE NAUSEOUS. MAINTENANCE FOUND THE APU STARTER LEAKING OIL AND REPLACED A DEFECTIVE O-RING PACKING IAW AMM 49-42-51. A SATISFACTORY LEAK AND OPS CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.