As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG DIRTY SOCK SMELL ON TAKEOFF DISSIPATED BUT LINGERED ON THROUGHOUT THE FLIGHT AND CABIN. GROUNDED - YES. INSPECTED PNEMATIC SYS & NO DEFECTS NOTED. SUSPECTED RESIDUAL OIL IN DUCTING. ACCOMPLISHED LONGER THAN NORMAL PACK BURNOUT. NO ODOR THROUGHOUT CABIN NOTED. A/C OK FOR SVC.