What was found
UNABLE TO CONTROL COCKPIT TEMP. UPON ARRIVAL CHECKED BOTH ZONE TEMP CONTROLLERS NO FAULTS PERFORMED TEST ON BOTH CONTROLLERS NO FAULTS UPDATED LABOR HOURS AND GROUND TIME REMOVED AND REPLACED #2 PACK ZONE TEMP CONTROLER PER AMM 21-61-20. BITE TEST PASSED.PARTS USED: 58-2161-9-0002,QTY :1 1334849,QTY :1 ADD EMP:U342887 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1334849 SN OFF 1437 CONTROLLER, CAB OFF 60-2161-9-0001 1437 ON 60-2161-9-0001 1566 UPON BITE TEST ON #1 CONTROLLER, FOUND TCV FAULT LIGHT ON . SUSPECT TEMP CONTROL VALVE INOP. TCV PN 398908-6. PART ORDERED TO BALLPARK DROPOFF. REMOVED AND REPLACED #1 TCV OPS AND LEAK CHECK GOOD BITE BOTH #1 AND #2 CONTROLLERS NO FAULTS FOUND PER 21-51-10PARTS USED: 58-2151-9-0011,QTY :1 58-2151-9-0009,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1359782 SN OFF 5756 VALVE, CONTROL, OFF 58-2151-9-0009 5756 ON 58-2151-9-0011 6229 AIRCRAFT OK TO CONTINUE