As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHEN POWER LEVERS WERE AT IDLE FOR A FEW MOMENTS ON ARRIVAL APPROXIMATELY 5 MINS FROM LANDING A PUNGENT DIRTY SOCK SMELL IN THECOCKPIT MUCH MORE THAN USUAL. LINGERED FOR A WHILE. APU WAS OFF.F/A'S DID NOT SMELL THE ODOR IN THE CABIN. MAINTENANCE FOUND APU SOURCE OF THE ODOR WITH LEAKS IN LOAD COMPRESSOR AND REPLACED APU.