As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CARB HEAT CONTROL WIRE BROKE AT PIVOT BOLT AT AIRBOX ARM. NO VISIBLE DAMAGE, BOLT MAY HAVE BEEN OVERTIGHT AND NICKED WIRE. NO WEAR ON CONTROL OTHERWISE, CABLE WIRE AND SHEATH ADJUSTED AND WIRE REATTACHED (EXTRA LENGTH AVAILABLE FOR ADJUSTMENT). AIRCRAFT RETURNED TO SERVICE.FAILURE POSSIBLY DUE TO ROUGH OPERATION BY STUDENT.