As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT WAS SNAGGED DUE TO ENGINE NOT SHUTTING DOWN PROPERLY, DURING INSPECTION, FOUND THAT THE ELECTRIC FUEL PUMP WAS PRODUCING A HIGHER PRESSURE ON THE LOW SETTING AND AT SHUTDOWN THE FUEL WAS BYPASSING THE MECHANICAL FUEL PUMP AND NOT ALLOWING THE ENGINE TO SHUTDOWN. A NEW FUEL PUMP WAS INSTALLED AND THE PROBLEM WAS RECTIFIED WITH NO OCCURRENCE SINCE.