As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LEFT ENGINE HAD AN UNCOMMANDED DECELERATION ON APPROACH INTO KJAC. REMOVAL OF THE FUEL DELIVERY UNIT REVEALED THE GEARBOX DRIVE SPLINE SHAFT WAS SHEARED LEADING TO THE FUEL DELIVERY UNIT NOT BEING ABLE TO SUPPLY FUEL TO THE ENGINE.