As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT, RPM WOULD NOT DECREASE BELOW 2000 RPM. INVESTIGATION FOUND ACCELERATOR PUMP NOZZLE DISLODGED AND LYING IN AIR BOX. CARBURETOR SENT TO REPAIR STA. FOR OVERHAUL. SUSPECT NOZZLE ADHESIVE BROKEN LOOSE WHEN SINGLE PIECE VENTURI WAS INSTALLED AT 1865 HRS. LANDING WAS SAFE. NO DAMAGE ENGINE KILLED ON FINAL, WITH MIXUTRE CONTROL.