As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CROSS COUNTRY TO KINGMAN, DURING A TOUCH AND GO PROCEDURE THE STUDENT DECREASED THE THROTTLES BUT THE RIGHT ENGINE POWER DID NOT REDUCE. DECLARED AN EMERGENCY AND DURING THE LANDING FLARE THE MIXTURE WAS CUT OFF KILLING THE ENGINE. MAINTENANCE PERSONNEL FOUND THE THROTTLE CABLE HAD BROKEN APPROXIMATELY .5 INCH INSIDE THE INSIDE THE CABLE SHEATH AT THE CABIN END OF THE CABLE. IT APPEARS TO HAVE BEEN CAUSED BY FLEXING AT THIS POINT DURING THROTTLE CHANGES.