As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ODOR IN COCKPIT DURING DESCENT - SMELLED LIKE UN-BURNED FUEL. FUMES EVEN STRONGER AFTER ENGINE SHUTDOWN AT THE GATE. FLT ATTENDANTS DID NOT SMELL. FOUND OIL LEAK AT APU OIL COOLER DUCT, REPLACED APU AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK ** (CLOSED)