As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A STRONG FUEL SMELL COMES INTO THE CABIN WHEN SHUTTING DOWN NR 1 ENGINE AFTER LANDING WITH THE APU RUNNING. CHECKED VENT SYSTEM. PRESSURIZED A/C WITH ALL SYSTEMS AND PERFORMED SHUTDOWN PROCEDURES. NO INDICATION OF FUEL SMELL NOTED. NO DISCREPANCIES NOTED.