As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ODOR, FLIGHT ATTENDANT'S STATED PCP ODOR IN REAR, ROW 22 - 28 WAS THE STRONGEST. FLIGHT DECK VENT OUTLET HAD A DIRTY SOCK ODOR. REMOVED AND REPLACED APU GENERATOR IAW AMM 24-23-51 AND CLEANED APU COMPARTMENT AND INLET AS REQUIRED. OPS AND LEAK CHECKED GOOD. NO ODOR REMAINS IN EITHER PACK SYSTEM. THE AIRCRAFT WAS GROUNDED.