What was found
INSTALL NEW CONTROL CABLE ASSY AS SUPPLIED BY CESSNA AIRCRAFT. INSTALLED AND RIGGED PER CESSNA R172K SM AND UNDER THE SUPERVISION OF A CESSNA FIELD SERVICE ENGINEER. ALL OPS CHECK OK ON GROUND. RUN-UPS CHECK OK. FLOWN FOR 2.0 HRS, NO ATTEMPT MADE TO ADJUST OR MOVE CONTROL WHILE IN-FLIGHT. UPON RETURN TO GROUND, GOVERNOR CONTROL CABLE ASSY FOUND FROZEN SOLID. CURRENT CABLE (CABLE NR 4) AWAITING REINSPECTION BY FIELD ENGINEER.