What was found
F/A REPORTED CABIN VERY HOT AT ROWS 6-14. ACCOMPLISHED QRH PROCEDURE, TRIM-AIR OFF, THEN CABIN TEMP STABILIZED TO NORMAL. TRIM AIR SWITCH REMAINED OFF. ACFT GROUNDED. PERFORMED PACK FLOW TEMP CONTROL BITE IAW FIM 21-62 TASK 801. GROUND TEST PASSED ON BOTH PFTC BUT RIGHT PFTC SHOWED EXTENSIVE HISTORY OF FAULTS 21-51266 TEMP CONTROL VALVE (LIMIT SWITCH FAULT) AND 21-51267 TEMP CONTROL VALVE (TCV FAULT). ACCOMPLISHED T/S FOR FAULTS 21-51266 AND 21-51267 IAW FIM 21-62 TASK 874 - INITIAL EVALUATION DID NOT CONFIRM FAULT. DUE TO RIGHT PFTC FAULT HISTORY, REMOVED AND REPLACED V141 RIGHT PACK TEMPERATURE CONTROL VALVE IAW AMM 21-51-10-000-801 & AMM 21-51-10-400-801. PERFORMED INSTALLATION TEST OF RIGHT PACK TEMP CONTROL VALVE IAW AMM 21-51-10-400-801 AND PACK FLOW TEMP CONTROLLER BITE TEST IAW AMM 21-61-00-740-801-002 - ALL TESTS PASSED, NO LEAKS NOTED.